xref: /linux/drivers/mmc/host/sdhci-pci-gli.c (revision 3ab378cfa793c648d4edf02bbfff3af8715aca91)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2019 Genesys Logic, Inc.
4  *
5  * Authors: Ben Chuang <ben.chuang@genesyslogic.com.tw>
6  *
7  * Version: v0.9.0 (2019-08-08)
8  */
9 
10 #include <linux/bitfield.h>
11 #include <linux/bits.h>
12 #include <linux/pci.h>
13 #include <linux/mmc/mmc.h>
14 #include <linux/delay.h>
15 #include <linux/of.h>
16 #include <linux/iopoll.h>
17 #include "sdhci.h"
18 #include "sdhci-cqhci.h"
19 #include "sdhci-pci.h"
20 #include "cqhci.h"
21 #include "sdhci-uhs2.h"
22 
23 /*  Genesys Logic extra registers */
24 #define SDHCI_GLI_9750_WT         0x800
25 #define   SDHCI_GLI_9750_WT_EN      BIT(0)
26 #define   GLI_9750_WT_EN_ON	    0x1
27 #define   GLI_9750_WT_EN_OFF	    0x0
28 
29 #define SDHCI_GLI_9750_CFG2          0x848
30 #define   SDHCI_GLI_9750_CFG2_L1DLY    GENMASK(28, 24)
31 #define   GLI_9750_CFG2_L1DLY_VALUE    0x1F
32 
33 #define SDHCI_GLI_9750_DRIVING      0x860
34 #define   SDHCI_GLI_9750_DRIVING_1    GENMASK(11, 0)
35 #define   SDHCI_GLI_9750_DRIVING_2    GENMASK(27, 26)
36 #define   GLI_9750_DRIVING_1_VALUE    0xFFF
37 #define   GLI_9750_DRIVING_2_VALUE    0x3
38 #define   SDHCI_GLI_9750_SEL_1        BIT(29)
39 #define   SDHCI_GLI_9750_SEL_2        BIT(31)
40 #define   SDHCI_GLI_9750_ALL_RST      (BIT(24)|BIT(25)|BIT(28)|BIT(30))
41 
42 #define SDHCI_GLI_9750_PLL	      0x864
43 #define   SDHCI_GLI_9750_PLL_LDIV       GENMASK(9, 0)
44 #define   SDHCI_GLI_9750_PLL_PDIV       GENMASK(14, 12)
45 #define   SDHCI_GLI_9750_PLL_DIR        BIT(15)
46 #define   SDHCI_GLI_9750_PLL_TX2_INV    BIT(23)
47 #define   SDHCI_GLI_9750_PLL_TX2_DLY    GENMASK(22, 20)
48 #define   GLI_9750_PLL_TX2_INV_VALUE    0x1
49 #define   GLI_9750_PLL_TX2_DLY_VALUE    0x0
50 #define   SDHCI_GLI_9750_PLLSSC_STEP    GENMASK(28, 24)
51 #define   SDHCI_GLI_9750_PLLSSC_EN      BIT(31)
52 
53 #define SDHCI_GLI_9750_PLLSSC        0x86C
54 #define   SDHCI_GLI_9750_PLLSSC_PPM    GENMASK(31, 16)
55 
56 #define SDHCI_GLI_9750_SW_CTRL      0x874
57 #define   SDHCI_GLI_9750_SW_CTRL_4    GENMASK(7, 6)
58 #define   GLI_9750_SW_CTRL_4_VALUE    0x3
59 
60 #define SDHCI_GLI_9750_MISC            0x878
61 #define   SDHCI_GLI_9750_MISC_TX1_INV    BIT(2)
62 #define   SDHCI_GLI_9750_MISC_RX_INV     BIT(3)
63 #define   SDHCI_GLI_9750_MISC_TX1_DLY    GENMASK(6, 4)
64 #define   GLI_9750_MISC_TX1_INV_VALUE    0x0
65 #define   GLI_9750_MISC_RX_INV_ON        0x1
66 #define   GLI_9750_MISC_RX_INV_OFF       0x0
67 #define   GLI_9750_MISC_RX_INV_VALUE     GLI_9750_MISC_RX_INV_OFF
68 #define   GLI_9750_MISC_TX1_DLY_VALUE    0x5
69 #define   SDHCI_GLI_9750_MISC_SSC_OFF    BIT(26)
70 
71 #define SDHCI_GLI_9750_TUNING_CONTROL	          0x540
72 #define   SDHCI_GLI_9750_TUNING_CONTROL_EN          BIT(4)
73 #define   GLI_9750_TUNING_CONTROL_EN_ON             0x1
74 #define   GLI_9750_TUNING_CONTROL_EN_OFF            0x0
75 #define   SDHCI_GLI_9750_TUNING_CONTROL_GLITCH_1    BIT(16)
76 #define   SDHCI_GLI_9750_TUNING_CONTROL_GLITCH_2    GENMASK(20, 19)
77 #define   GLI_9750_TUNING_CONTROL_GLITCH_1_VALUE    0x1
78 #define   GLI_9750_TUNING_CONTROL_GLITCH_2_VALUE    0x2
79 
80 #define SDHCI_GLI_9750_TUNING_PARAMETERS           0x544
81 #define   SDHCI_GLI_9750_TUNING_PARAMETERS_RX_DLY    GENMASK(2, 0)
82 #define   GLI_9750_TUNING_PARAMETERS_RX_DLY_VALUE    0x1
83 
84 #define SDHCI_GLI_9763E_CTRL_HS400  0x7
85 
86 #define SDHCI_GLI_9763E_HS400_ES_REG      0x52C
87 #define   SDHCI_GLI_9763E_HS400_ES_BIT      BIT(8)
88 
89 #define PCIE_GLI_9763E_VHS	 0x884
90 #define   GLI_9763E_VHS_REV	   GENMASK(19, 16)
91 #define   GLI_9763E_VHS_REV_R      0x0
92 #define   GLI_9763E_VHS_REV_M      0x1
93 #define   GLI_9763E_VHS_REV_W      0x2
94 #define PCIE_GLI_9763E_MB	 0x888
95 #define   GLI_9763E_MB_CMDQ_OFF	   BIT(19)
96 #define   GLI_9763E_MB_ERP_ON      BIT(7)
97 #define PCIE_GLI_9763E_SCR	 0x8E0
98 #define   GLI_9763E_SCR_AXI_REQ	   BIT(9)
99 
100 #define PCIE_GLI_9763E_CFG       0x8A0
101 #define   GLI_9763E_CFG_LPSN_DIS   BIT(12)
102 
103 #define PCIE_GLI_9763E_CFG2      0x8A4
104 #define   GLI_9763E_CFG2_L1DLY     GENMASK(28, 19)
105 #define   GLI_9763E_CFG2_L1DLY_MID 0x54
106 
107 #define PCIE_GLI_9763E_MMC_CTRL  0x960
108 #define   GLI_9763E_HS400_SLOW     BIT(3)
109 
110 #define PCIE_GLI_9763E_CLKRXDLY  0x934
111 #define   GLI_9763E_HS400_RXDLY    GENMASK(31, 28)
112 #define   GLI_9763E_HS400_RXDLY_5  0x5
113 
114 #define SDHCI_GLI_9763E_CQE_BASE_ADDR	 0x200
115 #define GLI_9763E_CQE_TRNS_MODE	   (SDHCI_TRNS_MULTI | \
116 				    SDHCI_TRNS_BLK_CNT_EN | \
117 				    SDHCI_TRNS_DMA)
118 
119 #define PCI_GLI_9755_WT       0x800
120 #define   PCI_GLI_9755_WT_EN    BIT(0)
121 #define   GLI_9755_WT_EN_ON     0x1
122 #define   GLI_9755_WT_EN_OFF    0x0
123 
124 #define PCI_GLI_9755_PECONF   0x44
125 #define   PCI_GLI_9755_LFCLK    GENMASK(14, 12)
126 #define   PCI_GLI_9755_DMACLK   BIT(29)
127 #define   PCI_GLI_9755_INVERT_CD  BIT(30)
128 #define   PCI_GLI_9755_INVERT_WP  BIT(31)
129 
130 #define PCI_GLI_9755_CFG2          0x48
131 #define   PCI_GLI_9755_CFG2_L1DLY    GENMASK(28, 24)
132 #define   GLI_9755_CFG2_L1DLY_VALUE  0x1F
133 
134 #define PCI_GLI_9755_PLL            0x64
135 #define   PCI_GLI_9755_PLL_LDIV       GENMASK(9, 0)
136 #define   PCI_GLI_9755_PLL_PDIV       GENMASK(14, 12)
137 #define   PCI_GLI_9755_PLL_DIR        BIT(15)
138 #define   PCI_GLI_9755_PLLSSC_STEP    GENMASK(28, 24)
139 #define   PCI_GLI_9755_PLLSSC_EN      BIT(31)
140 
141 #define PCI_GLI_9755_PLLSSC        0x68
142 #define   PCI_GLI_9755_PLLSSC_PPM    GENMASK(15, 0)
143 #define   PCI_GLI_9755_PLLSSC_RTL             BIT(24)
144 #define   GLI_9755_PLLSSC_RTL_VALUE           0x1
145 #define   PCI_GLI_9755_PLLSSC_TRANS_PASS      BIT(27)
146 #define   GLI_9755_PLLSSC_TRANS_PASS_VALUE    0x1
147 #define   PCI_GLI_9755_PLLSSC_RECV            GENMASK(29, 28)
148 #define   GLI_9755_PLLSSC_RECV_VALUE          0x0
149 #define   PCI_GLI_9755_PLLSSC_TRAN            GENMASK(31, 30)
150 #define   GLI_9755_PLLSSC_TRAN_VALUE          0x3
151 
152 #define PCI_GLI_9755_UHS2_PLL            0x6C
153 #define   PCI_GLI_9755_UHS2_PLL_SSC        GENMASK(9, 8)
154 #define   GLI_9755_UHS2_PLL_SSC_VALUE      0x0
155 #define   PCI_GLI_9755_UHS2_PLL_DELAY      BIT(18)
156 #define   GLI_9755_UHS2_PLL_DELAY_VALUE    0x1
157 #define   PCI_GLI_9755_UHS2_PLL_PDRST      BIT(27)
158 #define   GLI_9755_UHS2_PLL_PDRST_VALUE    0x1
159 
160 #define PCI_GLI_9755_SerDes  0x70
161 #define   PCI_GLI_9755_UHS2_SERDES_INTR       GENMASK(2, 0)
162 #define   GLI_9755_UHS2_SERDES_INTR_VALUE     0x3
163 #define   PCI_GLI_9755_UHS2_SERDES_ZC1        BIT(3)
164 #define   GLI_9755_UHS2_SERDES_ZC1_VALUE      0x0
165 #define   PCI_GLI_9755_UHS2_SERDES_ZC2        GENMASK(7, 4)
166 #define   GLI_9755_UHS2_SERDES_ZC2_DEFAULT    0xB
167 #define   GLI_9755_UHS2_SERDES_ZC2_SANDISK    0x0
168 #define PCI_GLI_9755_SCP_DIS   BIT(19)
169 #define   PCI_GLI_9755_UHS2_SERDES_TRAN       GENMASK(27, 24)
170 #define   GLI_9755_UHS2_SERDES_TRAN_VALUE     0xC
171 #define   PCI_GLI_9755_UHS2_SERDES_RECV       GENMASK(31, 28)
172 #define   GLI_9755_UHS2_SERDES_RECV_VALUE     0xF
173 
174 #define PCI_GLI_9755_MISC	    0x78
175 #define   PCI_GLI_9755_MISC_SSC_OFF    BIT(26)
176 
177 #define SDHCI_GLI_9767_SD_HOST_OPERATION_CTL				0x508
178 #define   SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_CMD_CONFLICT_CHECK	  BIT(0)
179 #define   SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE			  GENMASK(21, 16)
180 #define   SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_PLUG_IN_VALUE	  0x05
181 #define   SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_PLUG_OUT_VALUE	  0x3F
182 #define   SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE		  GENMASK(23, 22)
183 #define   SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE_1MS	  0x2
184 #define   SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE_10MS	  0x3
185 
186 #define SDHCI_GLI_9767_GM_BURST_SIZE			0x510
187 #define   SDHCI_GLI_9767_GM_BURST_SIZE_AXI_ALWAYS_SET	  BIT(8)
188 
189 #define PCIE_GLI_9767_VHS	0x884
190 #define   GLI_9767_VHS_REV	  GENMASK(19, 16)
191 #define   GLI_9767_VHS_REV_R	  0x0
192 #define   GLI_9767_VHS_REV_M	  0x1
193 #define   GLI_9767_VHS_REV_W	  0x2
194 
195 #define PCIE_GLI_9767_COM_MAILBOX		0x888
196 #define   PCIE_GLI_9767_COM_MAILBOX_SSC_EN	  BIT(1)
197 
198 #define PCIE_GLI_9767_CFG		0x8A0
199 #define   PCIE_GLI_9767_CFG_LOW_PWR_OFF	  BIT(12)
200 
201 #define PCIE_GLI_9767_COMBO_MUX_CTL			0x8C8
202 #define   PCIE_GLI_9767_COMBO_MUX_CTL_RST_EN		  BIT(6)
203 #define   PCIE_GLI_9767_COMBO_MUX_CTL_WAIT_PERST_EN	  BIT(10)
204 
205 #define PCIE_GLI_9767_PWR_MACRO_CTL					0x8D0
206 #define   PCIE_GLI_9767_PWR_MACRO_CTL_LOW_VOLTAGE			  GENMASK(3, 0)
207 #define   PCIE_GLI_9767_PWR_MACRO_CTL_LD0_LOW_OUTPUT_VOLTAGE		  GENMASK(15, 12)
208 #define   PCIE_GLI_9767_PWR_MACRO_CTL_LD0_LOW_OUTPUT_VOLTAGE_VALUE	  0x7
209 #define   PCIE_GLI_9767_PWR_MACRO_CTL_RCLK_AMPLITUDE_CTL		  GENMASK(29, 28)
210 #define   PCIE_GLI_9767_PWR_MACRO_CTL_RCLK_AMPLITUDE_CTL_VALUE		  0x3
211 
212 #define PCIE_GLI_9767_SCR				0x8E0
213 #define   PCIE_GLI_9767_SCR_AUTO_AXI_W_BURST		  BIT(6)
214 #define   PCIE_GLI_9767_SCR_AUTO_AXI_R_BURST		  BIT(7)
215 #define   PCIE_GLI_9767_SCR_AXI_REQ			  BIT(9)
216 #define   PCIE_GLI_9767_SCR_CARD_DET_PWR_SAVING_EN	  BIT(10)
217 #define   PCIE_GLI_9767_SCR_SYSTEM_CLK_SELECT_MODE0	  BIT(16)
218 #define   PCIE_GLI_9767_SCR_SYSTEM_CLK_SELECT_MODE1	  BIT(17)
219 #define   PCIE_GLI_9767_SCR_CORE_PWR_D3_OFF		  BIT(21)
220 #define   PCIE_GLI_9767_SCR_CFG_RST_DATA_LINK_DOWN	  BIT(30)
221 
222 #define PCIE_GLI_9767_RESET_REG				0x8E4
223 #define   PCIE_GLI_9767_RESET_REG_SD_HOST_SW_RESET	  BIT(0)
224 
225 #define PCIE_GLI_9767_UHS2_PHY_SET_REG1				0x90C
226 #define   PCIE_GLI_9767_UHS2_PHY_SET_REG1_SERDES_INTR		  GENMASK(31, 29)
227 #define   PCIE_GLI_9767_UHS2_PHY_SET_REG1_SERDES_INTR_VALUE	  0x3
228 
229 #define PCIE_GLI_9767_SDHC_CAP			0x91C
230 #define   PCIE_GLI_9767_SDHC_CAP_SDEI_RESULT	  BIT(5)
231 
232 #define PCIE_GLI_9767_SD_PLL_CTL			0x938
233 #define   PCIE_GLI_9767_SD_PLL_CTL_PLL_LDIV		  GENMASK(9, 0)
234 #define   PCIE_GLI_9767_SD_PLL_CTL_PLL_PDIV		  GENMASK(15, 12)
235 #define   PCIE_GLI_9767_SD_PLL_CTL_PLL_DIR_EN		  BIT(16)
236 #define   PCIE_GLI_9767_SD_PLL_CTL_SSC_EN		  BIT(19)
237 #define   PCIE_GLI_9767_SD_PLL_CTL_SSC_STEP_SETTING	  GENMASK(28, 24)
238 
239 #define PCIE_GLI_9767_SD_PLL_CTL2		0x93C
240 #define   PCIE_GLI_9767_SD_PLL_CTL2_PLLSSC_PPM	  GENMASK(31, 16)
241 
242 #define PCIE_GLI_9767_SD_EXPRESS_CTL			0x940
243 #define   PCIE_GLI_9767_SD_EXPRESS_CTL_SDEI_EXE		  BIT(0)
244 #define   PCIE_GLI_9767_SD_EXPRESS_CTL_SD_EXPRESS_MODE	  BIT(1)
245 
246 #define PCIE_GLI_9767_SD_DATA_MULTI_CTL				0x944
247 #define   PCIE_GLI_9767_SD_DATA_MULTI_CTL_SELECT_UHS2		  BIT(5)
248 #define   PCIE_GLI_9767_SD_DATA_MULTI_CTL_UHS2_SWITCH_CTL	  BIT(8)
249 #define   PCIE_GLI_9767_SD_DATA_MULTI_CTL_DISCONNECT_TIME	  GENMASK(23, 16)
250 #define   PCIE_GLI_9767_SD_DATA_MULTI_CTL_DISCONNECT_TIME_VALUE	  0x64
251 
252 #define PCIE_GLI_9767_UHS2_PHY_SET_REG2					0x948
253 #define   PCIE_GLI_9767_UHS2_PHY_SET_REG2_SSC_PPM_SETTING		  GENMASK(22, 21)
254 #define   PCIE_GLI_9767_UHS2_PHY_SET_REG2_SSC_PPM_SETTING_VALUE		  0x0
255 
256 #define PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2			0x950
257 #define   PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2_SDEI_COMPLETE	  BIT(0)
258 
259 #define PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_EN_REG2				0x954
260 #define   PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_EN_REG2_SDEI_COMPLETE_STATUS_EN	  BIT(0)
261 
262 #define PCIE_GLI_9767_NORMAL_ERR_INT_SIGNAL_EN_REG2				0x958
263 #define   PCIE_GLI_9767_NORMAL_ERR_INT_SIGNAL_EN_REG2_SDEI_COMPLETE_SIGNAL_EN	  BIT(0)
264 
265 #define PCIE_GLI_9767_UHS2_CTL1				0x95C
266 #define   PCIE_GLI_9767_UHS2_CTL1_TRANS_PASS		  BIT(5)
267 #define   PCIE_GLI_9767_UHS2_CTL1_TRANS_PASS_VALUE	  0x1
268 #define   PCIE_GLI_9767_UHS2_CTL1_DECODING_CTL		  BIT(6)
269 #define   PCIE_GLI_9767_UHS2_CTL1_DECODING_CTL_VALUE	  0x1
270 #define   PCIE_GLI_9767_UHS2_CTL1_SERDES_TRAN		  GENMASK(10, 7)
271 #define   PCIE_GLI_9767_UHS2_CTL1_SERDES_TRAN_VALUE	  0x3
272 #define   PCIE_GLI_9767_UHS2_CTL1_SERDES_RECV		  GENMASK(14, 11)
273 #define   PCIE_GLI_9767_UHS2_CTL1_SERDES_RECV_VALUE	  0xf
274 #define   PCIE_GLI_9767_UHS2_CTL1_DIR_TRANS		  GENMASK(16, 15)
275 #define   PCIE_GLI_9767_UHS2_CTL1_DIR_TRANS_VALUE	  0x0
276 #define   PCIE_GLI_9767_UHS2_CTL1_DIR_RECV		  GENMASK(18, 17)
277 #define   PCIE_GLI_9767_UHS2_CTL1_DIR_RECV_VALUE	  0x0
278 #define   PCIE_GLI_9767_UHS2_CTL1_PDRST			  BIT(25)
279 #define   PCIE_GLI_9767_UHS2_CTL1_PDRST_VALUE		  0x1
280 
281 #define PCIE_GLI_9767_UHS2_CTL2			0x964
282 #define   PCIE_GLI_9767_UHS2_CTL2_ZC		  GENMASK(3, 0)
283 #define   PCIE_GLI_9767_UHS2_CTL2_ZC_VALUE	  0xb
284 #define   PCIE_GLI_9767_UHS2_CTL2_ZC_CTL	  BIT(6)
285 #define   PCIE_GLI_9767_UHS2_CTL2_ZC_CTL_VALUE	  0x1
286 #define   PCIE_GLI_9767_UHS2_CTL2_FORCE_PHY_RESETN	BIT(13)
287 #define   PCIE_GLI_9767_UHS2_CTL2_FORCE_RESETN_VALUE	BIT(14)
288 
289 #define GLI_MAX_TUNING_LOOP 40
290 
291 /* Genesys Logic chipset */
sdhci_gli_mask_replay_timer_timeout(struct pci_dev * pdev)292 static void sdhci_gli_mask_replay_timer_timeout(struct pci_dev *pdev)
293 {
294 	int aer;
295 	u32 value;
296 
297 	/* mask the replay timer timeout of AER */
298 	aer = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ERR);
299 	if (aer) {
300 		pci_read_config_dword(pdev, aer + PCI_ERR_COR_MASK, &value);
301 		value |= PCI_ERR_COR_REP_TIMER;
302 		pci_write_config_dword(pdev, aer + PCI_ERR_COR_MASK, value);
303 	}
304 }
305 
gl9750_wt_on(struct sdhci_host * host)306 static inline void gl9750_wt_on(struct sdhci_host *host)
307 {
308 	u32 wt_value;
309 	u32 wt_enable;
310 
311 	wt_value = sdhci_readl(host, SDHCI_GLI_9750_WT);
312 	wt_enable = FIELD_GET(SDHCI_GLI_9750_WT_EN, wt_value);
313 
314 	if (wt_enable == GLI_9750_WT_EN_ON)
315 		return;
316 
317 	wt_value &= ~SDHCI_GLI_9750_WT_EN;
318 	wt_value |= FIELD_PREP(SDHCI_GLI_9750_WT_EN, GLI_9750_WT_EN_ON);
319 
320 	sdhci_writel(host, wt_value, SDHCI_GLI_9750_WT);
321 }
322 
gl9750_wt_off(struct sdhci_host * host)323 static inline void gl9750_wt_off(struct sdhci_host *host)
324 {
325 	u32 wt_value;
326 	u32 wt_enable;
327 
328 	wt_value = sdhci_readl(host, SDHCI_GLI_9750_WT);
329 	wt_enable = FIELD_GET(SDHCI_GLI_9750_WT_EN, wt_value);
330 
331 	if (wt_enable == GLI_9750_WT_EN_OFF)
332 		return;
333 
334 	wt_value &= ~SDHCI_GLI_9750_WT_EN;
335 	wt_value |= FIELD_PREP(SDHCI_GLI_9750_WT_EN, GLI_9750_WT_EN_OFF);
336 
337 	sdhci_writel(host, wt_value, SDHCI_GLI_9750_WT);
338 }
339 
gli_set_9750(struct sdhci_host * host)340 static void gli_set_9750(struct sdhci_host *host)
341 {
342 	u32 driving_value;
343 	u32 pll_value;
344 	u32 sw_ctrl_value;
345 	u32 misc_value;
346 	u32 parameter_value;
347 	u32 control_value;
348 	u16 ctrl2;
349 
350 	gl9750_wt_on(host);
351 
352 	driving_value = sdhci_readl(host, SDHCI_GLI_9750_DRIVING);
353 	pll_value = sdhci_readl(host, SDHCI_GLI_9750_PLL);
354 	sw_ctrl_value = sdhci_readl(host, SDHCI_GLI_9750_SW_CTRL);
355 	misc_value = sdhci_readl(host, SDHCI_GLI_9750_MISC);
356 	parameter_value = sdhci_readl(host, SDHCI_GLI_9750_TUNING_PARAMETERS);
357 	control_value = sdhci_readl(host, SDHCI_GLI_9750_TUNING_CONTROL);
358 
359 	driving_value &= ~(SDHCI_GLI_9750_DRIVING_1);
360 	driving_value &= ~(SDHCI_GLI_9750_DRIVING_2);
361 	driving_value |= FIELD_PREP(SDHCI_GLI_9750_DRIVING_1,
362 				    GLI_9750_DRIVING_1_VALUE);
363 	driving_value |= FIELD_PREP(SDHCI_GLI_9750_DRIVING_2,
364 				    GLI_9750_DRIVING_2_VALUE);
365 	driving_value &= ~(SDHCI_GLI_9750_SEL_1|SDHCI_GLI_9750_SEL_2|SDHCI_GLI_9750_ALL_RST);
366 	driving_value |= SDHCI_GLI_9750_SEL_2;
367 	sdhci_writel(host, driving_value, SDHCI_GLI_9750_DRIVING);
368 
369 	sw_ctrl_value &= ~SDHCI_GLI_9750_SW_CTRL_4;
370 	sw_ctrl_value |= FIELD_PREP(SDHCI_GLI_9750_SW_CTRL_4,
371 				    GLI_9750_SW_CTRL_4_VALUE);
372 	sdhci_writel(host, sw_ctrl_value, SDHCI_GLI_9750_SW_CTRL);
373 
374 	/* reset the tuning flow after reinit and before starting tuning */
375 	pll_value &= ~SDHCI_GLI_9750_PLL_TX2_INV;
376 	pll_value &= ~SDHCI_GLI_9750_PLL_TX2_DLY;
377 	pll_value |= FIELD_PREP(SDHCI_GLI_9750_PLL_TX2_INV,
378 				GLI_9750_PLL_TX2_INV_VALUE);
379 	pll_value |= FIELD_PREP(SDHCI_GLI_9750_PLL_TX2_DLY,
380 				GLI_9750_PLL_TX2_DLY_VALUE);
381 
382 	misc_value &= ~SDHCI_GLI_9750_MISC_TX1_INV;
383 	misc_value &= ~SDHCI_GLI_9750_MISC_RX_INV;
384 	misc_value &= ~SDHCI_GLI_9750_MISC_TX1_DLY;
385 	misc_value |= FIELD_PREP(SDHCI_GLI_9750_MISC_TX1_INV,
386 				 GLI_9750_MISC_TX1_INV_VALUE);
387 	misc_value |= FIELD_PREP(SDHCI_GLI_9750_MISC_RX_INV,
388 				 GLI_9750_MISC_RX_INV_VALUE);
389 	misc_value |= FIELD_PREP(SDHCI_GLI_9750_MISC_TX1_DLY,
390 				 GLI_9750_MISC_TX1_DLY_VALUE);
391 
392 	parameter_value &= ~SDHCI_GLI_9750_TUNING_PARAMETERS_RX_DLY;
393 	parameter_value |= FIELD_PREP(SDHCI_GLI_9750_TUNING_PARAMETERS_RX_DLY,
394 				      GLI_9750_TUNING_PARAMETERS_RX_DLY_VALUE);
395 
396 	control_value &= ~SDHCI_GLI_9750_TUNING_CONTROL_GLITCH_1;
397 	control_value &= ~SDHCI_GLI_9750_TUNING_CONTROL_GLITCH_2;
398 	control_value |= FIELD_PREP(SDHCI_GLI_9750_TUNING_CONTROL_GLITCH_1,
399 				    GLI_9750_TUNING_CONTROL_GLITCH_1_VALUE);
400 	control_value |= FIELD_PREP(SDHCI_GLI_9750_TUNING_CONTROL_GLITCH_2,
401 				    GLI_9750_TUNING_CONTROL_GLITCH_2_VALUE);
402 
403 	sdhci_writel(host, pll_value, SDHCI_GLI_9750_PLL);
404 	sdhci_writel(host, misc_value, SDHCI_GLI_9750_MISC);
405 
406 	/* disable tuned clk */
407 	ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
408 	ctrl2 &= ~SDHCI_CTRL_TUNED_CLK;
409 	sdhci_writew(host, ctrl2, SDHCI_HOST_CONTROL2);
410 
411 	/* enable tuning parameters control */
412 	control_value &= ~SDHCI_GLI_9750_TUNING_CONTROL_EN;
413 	control_value |= FIELD_PREP(SDHCI_GLI_9750_TUNING_CONTROL_EN,
414 				    GLI_9750_TUNING_CONTROL_EN_ON);
415 	sdhci_writel(host, control_value, SDHCI_GLI_9750_TUNING_CONTROL);
416 
417 	/* write tuning parameters */
418 	sdhci_writel(host, parameter_value, SDHCI_GLI_9750_TUNING_PARAMETERS);
419 
420 	/* disable tuning parameters control */
421 	control_value &= ~SDHCI_GLI_9750_TUNING_CONTROL_EN;
422 	control_value |= FIELD_PREP(SDHCI_GLI_9750_TUNING_CONTROL_EN,
423 				    GLI_9750_TUNING_CONTROL_EN_OFF);
424 	sdhci_writel(host, control_value, SDHCI_GLI_9750_TUNING_CONTROL);
425 
426 	/* clear tuned clk */
427 	ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
428 	ctrl2 &= ~SDHCI_CTRL_TUNED_CLK;
429 	sdhci_writew(host, ctrl2, SDHCI_HOST_CONTROL2);
430 
431 	gl9750_wt_off(host);
432 }
433 
gli_set_9750_rx_inv(struct sdhci_host * host,bool b)434 static void gli_set_9750_rx_inv(struct sdhci_host *host, bool b)
435 {
436 	u32 misc_value;
437 
438 	gl9750_wt_on(host);
439 
440 	misc_value = sdhci_readl(host, SDHCI_GLI_9750_MISC);
441 	misc_value &= ~SDHCI_GLI_9750_MISC_RX_INV;
442 	if (b) {
443 		misc_value |= FIELD_PREP(SDHCI_GLI_9750_MISC_RX_INV,
444 					 GLI_9750_MISC_RX_INV_ON);
445 	} else {
446 		misc_value |= FIELD_PREP(SDHCI_GLI_9750_MISC_RX_INV,
447 					 GLI_9750_MISC_RX_INV_OFF);
448 	}
449 	sdhci_writel(host, misc_value, SDHCI_GLI_9750_MISC);
450 
451 	gl9750_wt_off(host);
452 }
453 
__sdhci_execute_tuning_9750(struct sdhci_host * host,u32 opcode)454 static int __sdhci_execute_tuning_9750(struct sdhci_host *host, u32 opcode)
455 {
456 	int i;
457 	int rx_inv;
458 
459 	for (rx_inv = 0; rx_inv < 2; rx_inv++) {
460 		gli_set_9750_rx_inv(host, !!rx_inv);
461 		sdhci_start_tuning(host);
462 
463 		for (i = 0; i < GLI_MAX_TUNING_LOOP; i++) {
464 			u16 ctrl;
465 
466 			sdhci_send_tuning(host, opcode);
467 
468 			if (!host->tuning_done) {
469 				sdhci_abort_tuning(host, opcode);
470 				break;
471 			}
472 
473 			ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
474 			if (!(ctrl & SDHCI_CTRL_EXEC_TUNING)) {
475 				if (ctrl & SDHCI_CTRL_TUNED_CLK)
476 					return 0; /* Success! */
477 				break;
478 			}
479 		}
480 	}
481 	if (!host->tuning_done) {
482 		pr_info("%s: Tuning timeout, falling back to fixed sampling clock\n",
483 			mmc_hostname(host->mmc));
484 		return -ETIMEDOUT;
485 	}
486 
487 	pr_info("%s: Tuning failed, falling back to fixed sampling clock\n",
488 		mmc_hostname(host->mmc));
489 	sdhci_reset_tuning(host);
490 
491 	return -EAGAIN;
492 }
493 
gl9750_execute_tuning(struct sdhci_host * host,u32 opcode)494 static int gl9750_execute_tuning(struct sdhci_host *host, u32 opcode)
495 {
496 	host->mmc->retune_period = 0;
497 	if (host->tuning_mode == SDHCI_TUNING_MODE_1)
498 		host->mmc->retune_period = host->tuning_count;
499 
500 	gli_set_9750(host);
501 	host->tuning_err = __sdhci_execute_tuning_9750(host, opcode);
502 	sdhci_end_tuning(host);
503 
504 	return 0;
505 }
506 
gl9750_disable_ssc_pll(struct sdhci_host * host)507 static void gl9750_disable_ssc_pll(struct sdhci_host *host)
508 {
509 	u32 pll;
510 
511 	gl9750_wt_on(host);
512 	pll = sdhci_readl(host, SDHCI_GLI_9750_PLL);
513 	pll &= ~(SDHCI_GLI_9750_PLL_DIR | SDHCI_GLI_9750_PLLSSC_EN);
514 	sdhci_writel(host, pll, SDHCI_GLI_9750_PLL);
515 	gl9750_wt_off(host);
516 }
517 
gl9750_set_pll(struct sdhci_host * host,u8 dir,u16 ldiv,u8 pdiv)518 static void gl9750_set_pll(struct sdhci_host *host, u8 dir, u16 ldiv, u8 pdiv)
519 {
520 	u32 pll;
521 
522 	gl9750_wt_on(host);
523 	pll = sdhci_readl(host, SDHCI_GLI_9750_PLL);
524 	pll &= ~(SDHCI_GLI_9750_PLL_LDIV |
525 		 SDHCI_GLI_9750_PLL_PDIV |
526 		 SDHCI_GLI_9750_PLL_DIR);
527 	pll |= FIELD_PREP(SDHCI_GLI_9750_PLL_LDIV, ldiv) |
528 	       FIELD_PREP(SDHCI_GLI_9750_PLL_PDIV, pdiv) |
529 	       FIELD_PREP(SDHCI_GLI_9750_PLL_DIR, dir);
530 	sdhci_writel(host, pll, SDHCI_GLI_9750_PLL);
531 	gl9750_wt_off(host);
532 
533 	/* wait for pll stable */
534 	mdelay(1);
535 }
536 
gl9750_ssc_enable(struct sdhci_host * host)537 static bool gl9750_ssc_enable(struct sdhci_host *host)
538 {
539 	u32 misc;
540 	u8 off;
541 
542 	gl9750_wt_on(host);
543 	misc = sdhci_readl(host, SDHCI_GLI_9750_MISC);
544 	off = FIELD_GET(SDHCI_GLI_9750_MISC_SSC_OFF, misc);
545 	gl9750_wt_off(host);
546 
547 	return !off;
548 }
549 
gl9750_set_ssc(struct sdhci_host * host,u8 enable,u8 step,u16 ppm)550 static void gl9750_set_ssc(struct sdhci_host *host, u8 enable, u8 step, u16 ppm)
551 {
552 	u32 pll;
553 	u32 ssc;
554 
555 	gl9750_wt_on(host);
556 	pll = sdhci_readl(host, SDHCI_GLI_9750_PLL);
557 	ssc = sdhci_readl(host, SDHCI_GLI_9750_PLLSSC);
558 	pll &= ~(SDHCI_GLI_9750_PLLSSC_STEP |
559 		 SDHCI_GLI_9750_PLLSSC_EN);
560 	ssc &= ~SDHCI_GLI_9750_PLLSSC_PPM;
561 	pll |= FIELD_PREP(SDHCI_GLI_9750_PLLSSC_STEP, step) |
562 	       FIELD_PREP(SDHCI_GLI_9750_PLLSSC_EN, enable);
563 	ssc |= FIELD_PREP(SDHCI_GLI_9750_PLLSSC_PPM, ppm);
564 	sdhci_writel(host, ssc, SDHCI_GLI_9750_PLLSSC);
565 	sdhci_writel(host, pll, SDHCI_GLI_9750_PLL);
566 	gl9750_wt_off(host);
567 }
568 
gl9750_set_ssc_pll_205mhz(struct sdhci_host * host)569 static void gl9750_set_ssc_pll_205mhz(struct sdhci_host *host)
570 {
571 	bool enable = gl9750_ssc_enable(host);
572 
573 	/* set pll to 205MHz and ssc */
574 	gl9750_set_ssc(host, enable, 0xF, 0x5A1D);
575 	gl9750_set_pll(host, 0x1, 0x246, 0x0);
576 }
577 
gl9750_set_ssc_pll_100mhz(struct sdhci_host * host)578 static void gl9750_set_ssc_pll_100mhz(struct sdhci_host *host)
579 {
580 	bool enable = gl9750_ssc_enable(host);
581 
582 	/* set pll to 100MHz and ssc */
583 	gl9750_set_ssc(host, enable, 0xE, 0x51EC);
584 	gl9750_set_pll(host, 0x1, 0x244, 0x1);
585 }
586 
gl9750_set_ssc_pll_50mhz(struct sdhci_host * host)587 static void gl9750_set_ssc_pll_50mhz(struct sdhci_host *host)
588 {
589 	bool enable = gl9750_ssc_enable(host);
590 
591 	/* set pll to 50MHz and ssc */
592 	gl9750_set_ssc(host, enable, 0xE, 0x51EC);
593 	gl9750_set_pll(host, 0x1, 0x244, 0x3);
594 }
595 
sdhci_gl9750_set_clock(struct sdhci_host * host,unsigned int clock)596 static void sdhci_gl9750_set_clock(struct sdhci_host *host, unsigned int clock)
597 {
598 	struct mmc_ios *ios = &host->mmc->ios;
599 	u16 clk;
600 
601 	host->mmc->actual_clock = 0;
602 
603 	gl9750_disable_ssc_pll(host);
604 	sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
605 
606 	if (clock == 0)
607 		return;
608 
609 	clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock);
610 	if (clock == 200000000 && ios->timing == MMC_TIMING_UHS_SDR104) {
611 		host->mmc->actual_clock = 205000000;
612 		gl9750_set_ssc_pll_205mhz(host);
613 	} else if (clock == 100000000) {
614 		gl9750_set_ssc_pll_100mhz(host);
615 	} else if (clock == 50000000) {
616 		gl9750_set_ssc_pll_50mhz(host);
617 	}
618 
619 	sdhci_enable_clk(host, clk);
620 }
621 
gl9750_hw_setting(struct sdhci_host * host)622 static void gl9750_hw_setting(struct sdhci_host *host)
623 {
624 	struct sdhci_pci_slot *slot = sdhci_priv(host);
625 	struct pci_dev *pdev;
626 	u32 value;
627 
628 	pdev = slot->chip->pdev;
629 
630 	gl9750_wt_on(host);
631 
632 	value = sdhci_readl(host, SDHCI_GLI_9750_CFG2);
633 	value &= ~SDHCI_GLI_9750_CFG2_L1DLY;
634 	/* set ASPM L1 entry delay to 7.9us */
635 	value |= FIELD_PREP(SDHCI_GLI_9750_CFG2_L1DLY,
636 			    GLI_9750_CFG2_L1DLY_VALUE);
637 	sdhci_writel(host, value, SDHCI_GLI_9750_CFG2);
638 
639 	/* toggle PM state to allow GL9750 to enter ASPM L1.2 */
640 	pci_set_power_state(pdev, PCI_D3hot);
641 	pci_set_power_state(pdev, PCI_D0);
642 
643 	/* mask the replay timer timeout of AER */
644 	sdhci_gli_mask_replay_timer_timeout(pdev);
645 
646 	gl9750_wt_off(host);
647 }
648 
gli_pcie_enable_msi(struct sdhci_pci_slot * slot)649 static void gli_pcie_enable_msi(struct sdhci_pci_slot *slot)
650 {
651 	int ret;
652 
653 	ret = pci_alloc_irq_vectors(slot->chip->pdev, 1, 1,
654 				    PCI_IRQ_MSI | PCI_IRQ_MSIX);
655 	if (ret < 0) {
656 		pr_warn("%s: enable PCI MSI failed, error=%d\n",
657 		       mmc_hostname(slot->host->mmc), ret);
658 		return;
659 	}
660 
661 	slot->host->irq = pci_irq_vector(slot->chip->pdev, 0);
662 }
663 
gl9755_wt_on(struct pci_dev * pdev)664 static inline void gl9755_wt_on(struct pci_dev *pdev)
665 {
666 	u32 wt_value;
667 	u32 wt_enable;
668 
669 	pci_read_config_dword(pdev, PCI_GLI_9755_WT, &wt_value);
670 	wt_enable = FIELD_GET(PCI_GLI_9755_WT_EN, wt_value);
671 
672 	if (wt_enable == GLI_9755_WT_EN_ON)
673 		return;
674 
675 	wt_value &= ~PCI_GLI_9755_WT_EN;
676 	wt_value |= FIELD_PREP(PCI_GLI_9755_WT_EN, GLI_9755_WT_EN_ON);
677 
678 	pci_write_config_dword(pdev, PCI_GLI_9755_WT, wt_value);
679 }
680 
gl9755_wt_off(struct pci_dev * pdev)681 static inline void gl9755_wt_off(struct pci_dev *pdev)
682 {
683 	u32 wt_value;
684 	u32 wt_enable;
685 
686 	pci_read_config_dword(pdev, PCI_GLI_9755_WT, &wt_value);
687 	wt_enable = FIELD_GET(PCI_GLI_9755_WT_EN, wt_value);
688 
689 	if (wt_enable == GLI_9755_WT_EN_OFF)
690 		return;
691 
692 	wt_value &= ~PCI_GLI_9755_WT_EN;
693 	wt_value |= FIELD_PREP(PCI_GLI_9755_WT_EN, GLI_9755_WT_EN_OFF);
694 
695 	pci_write_config_dword(pdev, PCI_GLI_9755_WT, wt_value);
696 }
697 
gl9755_disable_ssc_pll(struct pci_dev * pdev)698 static void gl9755_disable_ssc_pll(struct pci_dev *pdev)
699 {
700 	u32 pll;
701 
702 	gl9755_wt_on(pdev);
703 	pci_read_config_dword(pdev, PCI_GLI_9755_PLL, &pll);
704 	pll &= ~(PCI_GLI_9755_PLL_DIR | PCI_GLI_9755_PLLSSC_EN);
705 	pci_write_config_dword(pdev, PCI_GLI_9755_PLL, pll);
706 	gl9755_wt_off(pdev);
707 }
708 
gl9755_set_pll(struct pci_dev * pdev,u8 dir,u16 ldiv,u8 pdiv)709 static void gl9755_set_pll(struct pci_dev *pdev, u8 dir, u16 ldiv, u8 pdiv)
710 {
711 	u32 pll;
712 
713 	gl9755_wt_on(pdev);
714 	pci_read_config_dword(pdev, PCI_GLI_9755_PLL, &pll);
715 	pll &= ~(PCI_GLI_9755_PLL_LDIV |
716 		 PCI_GLI_9755_PLL_PDIV |
717 		 PCI_GLI_9755_PLL_DIR);
718 	pll |= FIELD_PREP(PCI_GLI_9755_PLL_LDIV, ldiv) |
719 	       FIELD_PREP(PCI_GLI_9755_PLL_PDIV, pdiv) |
720 	       FIELD_PREP(PCI_GLI_9755_PLL_DIR, dir);
721 	pci_write_config_dword(pdev, PCI_GLI_9755_PLL, pll);
722 	gl9755_wt_off(pdev);
723 
724 	/* wait for pll stable */
725 	mdelay(1);
726 }
727 
gl9755_ssc_enable(struct pci_dev * pdev)728 static bool gl9755_ssc_enable(struct pci_dev *pdev)
729 {
730 	u32 misc;
731 	u8 off;
732 
733 	gl9755_wt_on(pdev);
734 	pci_read_config_dword(pdev, PCI_GLI_9755_MISC, &misc);
735 	off = FIELD_GET(PCI_GLI_9755_MISC_SSC_OFF, misc);
736 	gl9755_wt_off(pdev);
737 
738 	return !off;
739 }
740 
gl9755_set_ssc(struct pci_dev * pdev,u8 enable,u8 step,u16 ppm)741 static void gl9755_set_ssc(struct pci_dev *pdev, u8 enable, u8 step, u16 ppm)
742 {
743 	u32 pll;
744 	u32 ssc;
745 
746 	gl9755_wt_on(pdev);
747 	pci_read_config_dword(pdev, PCI_GLI_9755_PLL, &pll);
748 	pci_read_config_dword(pdev, PCI_GLI_9755_PLLSSC, &ssc);
749 	pll &= ~(PCI_GLI_9755_PLLSSC_STEP |
750 		 PCI_GLI_9755_PLLSSC_EN);
751 	ssc &= ~PCI_GLI_9755_PLLSSC_PPM;
752 	pll |= FIELD_PREP(PCI_GLI_9755_PLLSSC_STEP, step) |
753 	       FIELD_PREP(PCI_GLI_9755_PLLSSC_EN, enable);
754 	ssc |= FIELD_PREP(PCI_GLI_9755_PLLSSC_PPM, ppm);
755 	pci_write_config_dword(pdev, PCI_GLI_9755_PLLSSC, ssc);
756 	pci_write_config_dword(pdev, PCI_GLI_9755_PLL, pll);
757 	gl9755_wt_off(pdev);
758 }
759 
gl9755_set_ssc_pll_205mhz(struct pci_dev * pdev)760 static void gl9755_set_ssc_pll_205mhz(struct pci_dev *pdev)
761 {
762 	bool enable = gl9755_ssc_enable(pdev);
763 
764 	/* set pll to 205MHz and ssc */
765 	gl9755_set_ssc(pdev, enable, 0xF, 0x5A1D);
766 	gl9755_set_pll(pdev, 0x1, 0x246, 0x0);
767 }
768 
gl9755_set_ssc_pll_100mhz(struct pci_dev * pdev)769 static void gl9755_set_ssc_pll_100mhz(struct pci_dev *pdev)
770 {
771 	bool enable = gl9755_ssc_enable(pdev);
772 
773 	/* set pll to 100MHz and ssc */
774 	gl9755_set_ssc(pdev, enable, 0xE, 0x51EC);
775 	gl9755_set_pll(pdev, 0x1, 0x244, 0x1);
776 }
777 
gl9755_set_ssc_pll_50mhz(struct pci_dev * pdev)778 static void gl9755_set_ssc_pll_50mhz(struct pci_dev *pdev)
779 {
780 	bool enable = gl9755_ssc_enable(pdev);
781 
782 	/* set pll to 50MHz and ssc */
783 	gl9755_set_ssc(pdev, enable, 0xE, 0x51EC);
784 	gl9755_set_pll(pdev, 0x1, 0x244, 0x3);
785 }
786 
sdhci_gl9755_set_clock(struct sdhci_host * host,unsigned int clock)787 static void sdhci_gl9755_set_clock(struct sdhci_host *host, unsigned int clock)
788 {
789 	struct sdhci_pci_slot *slot = sdhci_priv(host);
790 	struct mmc_ios *ios = &host->mmc->ios;
791 	struct pci_dev *pdev;
792 	u16 clk;
793 
794 	pdev = slot->chip->pdev;
795 	host->mmc->actual_clock = 0;
796 
797 	gl9755_disable_ssc_pll(pdev);
798 	sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
799 
800 	if (clock == 0)
801 		return;
802 
803 	clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock);
804 	if (clock == 200000000 && ios->timing == MMC_TIMING_UHS_SDR104) {
805 		host->mmc->actual_clock = 205000000;
806 		gl9755_set_ssc_pll_205mhz(pdev);
807 	} else if (clock == 100000000) {
808 		gl9755_set_ssc_pll_100mhz(pdev);
809 	} else if (clock == 50000000) {
810 		gl9755_set_ssc_pll_50mhz(pdev);
811 	}
812 
813 	sdhci_enable_clk(host, clk);
814 }
815 
gl9755_hw_setting(struct sdhci_pci_slot * slot)816 static void gl9755_hw_setting(struct sdhci_pci_slot *slot)
817 {
818 	struct pci_dev *pdev = slot->chip->pdev;
819 	u32 value;
820 
821 	gl9755_wt_on(pdev);
822 
823 	pci_read_config_dword(pdev, PCI_GLI_9755_PECONF, &value);
824 	/*
825 	 * Apple ARM64 platforms using these chips may have
826 	 * inverted CD/WP detection.
827 	 */
828 	if (of_property_read_bool(pdev->dev.of_node, "cd-inverted"))
829 		value |= PCI_GLI_9755_INVERT_CD;
830 	if (of_property_read_bool(pdev->dev.of_node, "wp-inverted"))
831 		value |= PCI_GLI_9755_INVERT_WP;
832 	value &= ~PCI_GLI_9755_LFCLK;
833 	value &= ~PCI_GLI_9755_DMACLK;
834 	pci_write_config_dword(pdev, PCI_GLI_9755_PECONF, value);
835 
836 	/* enable short circuit protection */
837 	pci_read_config_dword(pdev, PCI_GLI_9755_SerDes, &value);
838 	value &= ~PCI_GLI_9755_SCP_DIS;
839 	pci_write_config_dword(pdev, PCI_GLI_9755_SerDes, value);
840 
841 	pci_read_config_dword(pdev, PCI_GLI_9755_CFG2, &value);
842 	value &= ~PCI_GLI_9755_CFG2_L1DLY;
843 	/* set ASPM L1 entry delay to 7.9us */
844 	value |= FIELD_PREP(PCI_GLI_9755_CFG2_L1DLY,
845 			    GLI_9755_CFG2_L1DLY_VALUE);
846 	pci_write_config_dword(pdev, PCI_GLI_9755_CFG2, value);
847 
848 	/* toggle PM state to allow GL9755 to enter ASPM L1.2 */
849 	pci_set_power_state(pdev, PCI_D3hot);
850 	pci_set_power_state(pdev, PCI_D0);
851 
852 	/* mask the replay timer timeout of AER */
853 	sdhci_gli_mask_replay_timer_timeout(pdev);
854 
855 	gl9755_wt_off(pdev);
856 }
857 
gl9755_vendor_init(struct sdhci_host * host)858 static void gl9755_vendor_init(struct sdhci_host *host)
859 {
860 	struct sdhci_pci_slot *slot = sdhci_priv(host);
861 	struct pci_dev *pdev = slot->chip->pdev;
862 	u32 serdes;
863 	u32 pllssc;
864 	u32 uhs2_pll;
865 
866 	gl9755_wt_on(pdev);
867 
868 	pci_read_config_dword(pdev, PCI_GLI_9755_SerDes, &serdes);
869 	serdes &= ~PCI_GLI_9755_UHS2_SERDES_TRAN;
870 	serdes |= FIELD_PREP(PCI_GLI_9755_UHS2_SERDES_TRAN,
871 			     GLI_9755_UHS2_SERDES_TRAN_VALUE);
872 	serdes &= ~PCI_GLI_9755_UHS2_SERDES_RECV;
873 	serdes |= FIELD_PREP(PCI_GLI_9755_UHS2_SERDES_RECV,
874 			     GLI_9755_UHS2_SERDES_RECV_VALUE);
875 	serdes &= ~PCI_GLI_9755_UHS2_SERDES_INTR;
876 	serdes |= FIELD_PREP(PCI_GLI_9755_UHS2_SERDES_INTR,
877 			     GLI_9755_UHS2_SERDES_INTR_VALUE);
878 	serdes &= ~PCI_GLI_9755_UHS2_SERDES_ZC1;
879 	serdes |= FIELD_PREP(PCI_GLI_9755_UHS2_SERDES_ZC1,
880 			     GLI_9755_UHS2_SERDES_ZC1_VALUE);
881 	serdes &= ~PCI_GLI_9755_UHS2_SERDES_ZC2;
882 	serdes |= FIELD_PREP(PCI_GLI_9755_UHS2_SERDES_ZC2,
883 			     GLI_9755_UHS2_SERDES_ZC2_DEFAULT);
884 	pci_write_config_dword(pdev, PCI_GLI_9755_SerDes, serdes);
885 
886 	pci_read_config_dword(pdev, PCI_GLI_9755_UHS2_PLL, &uhs2_pll);
887 	uhs2_pll &= ~PCI_GLI_9755_UHS2_PLL_SSC;
888 	uhs2_pll |= FIELD_PREP(PCI_GLI_9755_UHS2_PLL_SSC,
889 			  GLI_9755_UHS2_PLL_SSC_VALUE);
890 	uhs2_pll &= ~PCI_GLI_9755_UHS2_PLL_DELAY;
891 	uhs2_pll |= FIELD_PREP(PCI_GLI_9755_UHS2_PLL_DELAY,
892 			  GLI_9755_UHS2_PLL_DELAY_VALUE);
893 	uhs2_pll &= ~PCI_GLI_9755_UHS2_PLL_PDRST;
894 	uhs2_pll |= FIELD_PREP(PCI_GLI_9755_UHS2_PLL_PDRST,
895 			  GLI_9755_UHS2_PLL_PDRST_VALUE);
896 	pci_write_config_dword(pdev, PCI_GLI_9755_UHS2_PLL, uhs2_pll);
897 
898 	pci_read_config_dword(pdev, PCI_GLI_9755_PLLSSC, &pllssc);
899 	pllssc &= ~PCI_GLI_9755_PLLSSC_RTL;
900 	pllssc |= FIELD_PREP(PCI_GLI_9755_PLLSSC_RTL,
901 			  GLI_9755_PLLSSC_RTL_VALUE);
902 	pllssc &= ~PCI_GLI_9755_PLLSSC_TRANS_PASS;
903 	pllssc |= FIELD_PREP(PCI_GLI_9755_PLLSSC_TRANS_PASS,
904 			  GLI_9755_PLLSSC_TRANS_PASS_VALUE);
905 	pllssc &= ~PCI_GLI_9755_PLLSSC_RECV;
906 	pllssc |= FIELD_PREP(PCI_GLI_9755_PLLSSC_RECV,
907 			  GLI_9755_PLLSSC_RECV_VALUE);
908 	pllssc &= ~PCI_GLI_9755_PLLSSC_TRAN;
909 	pllssc |= FIELD_PREP(PCI_GLI_9755_PLLSSC_TRAN,
910 			  GLI_9755_PLLSSC_TRAN_VALUE);
911 	pci_write_config_dword(pdev, PCI_GLI_9755_PLLSSC, pllssc);
912 
913 	gl9755_wt_off(pdev);
914 }
915 
sdhci_gli_pre_detect_init(struct sdhci_host * host)916 static void sdhci_gli_pre_detect_init(struct sdhci_host *host)
917 {
918 	/* Need more time on UHS2 detect flow */
919 	sdhci_writeb(host, 0xA7, SDHCI_UHS2_TIMER_CTRL);
920 }
921 
sdhci_gli_overcurrent_event_enable(struct sdhci_host * host,bool enable)922 static void sdhci_gli_overcurrent_event_enable(struct sdhci_host *host, bool enable)
923 {
924 	u32 mask;
925 
926 	mask = sdhci_readl(host, SDHCI_SIGNAL_ENABLE);
927 	if (enable)
928 		mask |= SDHCI_INT_BUS_POWER;
929 	else
930 		mask &= ~SDHCI_INT_BUS_POWER;
931 
932 	sdhci_writel(host, mask, SDHCI_SIGNAL_ENABLE);
933 
934 	mask = sdhci_readl(host, SDHCI_INT_ENABLE);
935 	if (enable)
936 		mask |= SDHCI_INT_BUS_POWER;
937 	else
938 		mask &= ~SDHCI_INT_BUS_POWER;
939 
940 	sdhci_writel(host, mask, SDHCI_INT_ENABLE);
941 }
942 
gl9755_set_power(struct sdhci_host * host,unsigned char mode,unsigned short vdd)943 static void gl9755_set_power(struct sdhci_host *host, unsigned char mode,
944 			     unsigned short vdd)
945 {
946 	u8 pwr = 0;
947 
948 	if (mode != MMC_POWER_OFF) {
949 		pwr = sdhci_get_vdd_value(vdd);
950 		if (!pwr)
951 			WARN(1, "%s: Invalid vdd %#x\n", mmc_hostname(host->mmc), vdd);
952 		pwr |= SDHCI_VDD2_POWER_180;
953 	}
954 
955 	if (host->pwr == pwr)
956 		return;
957 
958 	host->pwr = pwr;
959 
960 	if (pwr == 0) {
961 		sdhci_gli_overcurrent_event_enable(host, false);
962 		sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
963 	} else {
964 		sdhci_gli_overcurrent_event_enable(host, false);
965 		sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
966 
967 		pwr |= (SDHCI_POWER_ON | SDHCI_VDD2_POWER_ON);
968 
969 		sdhci_writeb(host, pwr & 0xf, SDHCI_POWER_CONTROL);
970 		/* wait stable */
971 		mdelay(5);
972 		sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
973 		/* wait stable */
974 		mdelay(5);
975 		sdhci_gli_overcurrent_event_enable(host, true);
976 	}
977 }
978 
sdhci_wait_clock_stable(struct sdhci_host * host)979 static bool sdhci_wait_clock_stable(struct sdhci_host *host)
980 {
981 	u16 clk = 0;
982 
983 	if (read_poll_timeout_atomic(sdhci_readw, clk, (clk & SDHCI_CLOCK_INT_STABLE),
984 				     10, 20000, false, host, SDHCI_CLOCK_CONTROL)) {
985 		pr_err("%s: Internal clock never stabilised.\n", mmc_hostname(host->mmc));
986 		sdhci_dumpregs(host);
987 		return false;
988 	}
989 	return true;
990 }
991 
sdhci_gli_enable_internal_clock(struct sdhci_host * host)992 static void sdhci_gli_enable_internal_clock(struct sdhci_host *host)
993 {
994 	u16 ctrl2;
995 
996 	ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
997 
998 	sdhci_writew(host, SDHCI_CLOCK_INT_EN, SDHCI_CLOCK_CONTROL);
999 
1000 	if (!((ctrl2 & SDHCI_CTRL_V4_MODE) &&
1001 	      (ctrl2 & SDHCI_CTRL_UHS2_ENABLE))) {
1002 		sdhci_wait_clock_stable(host);
1003 		sdhci_writew(host, SDHCI_CTRL_V4_MODE, SDHCI_HOST_CONTROL2);
1004 	}
1005 }
1006 
sdhci_gli_wait_software_reset_done(struct sdhci_host * host,u8 mask)1007 static int sdhci_gli_wait_software_reset_done(struct sdhci_host *host, u8 mask)
1008 {
1009 	u8 rst;
1010 
1011 	/* hw clears the bit when it's done */
1012 	if (read_poll_timeout_atomic(sdhci_readb, rst, !(rst & mask),
1013 				     10, 100000, false, host, SDHCI_SOFTWARE_RESET)) {
1014 		pr_err("%s: Reset 0x%x never completed.\n", mmc_hostname(host->mmc), (int)mask);
1015 		sdhci_dumpregs(host);
1016 		/* manual clear */
1017 		sdhci_writeb(host, 0, SDHCI_SOFTWARE_RESET);
1018 		return -ETIMEDOUT;
1019 	}
1020 
1021 	return 0;
1022 }
1023 
sdhci_gli_uhs2_reset_sd_tran(struct sdhci_host * host)1024 static void sdhci_gli_uhs2_reset_sd_tran(struct sdhci_host *host)
1025 {
1026 	/* do this on UHS2 mode */
1027 	if (host->mmc->uhs2_sd_tran) {
1028 		sdhci_uhs2_reset(host, SDHCI_UHS2_SW_RESET_SD);
1029 		sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
1030 		sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
1031 		sdhci_uhs2_clear_set_irqs(host,
1032 					  SDHCI_INT_ALL_MASK,
1033 					  SDHCI_UHS2_INT_ERROR_MASK);
1034 	}
1035 }
1036 
sdhci_gl9755_reset(struct sdhci_host * host,u8 mask)1037 static void sdhci_gl9755_reset(struct sdhci_host *host, u8 mask)
1038 {
1039 	/* need internal clock */
1040 	if (mask & SDHCI_RESET_ALL)
1041 		sdhci_gli_enable_internal_clock(host);
1042 
1043 	sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
1044 
1045 	/* reset sd-tran on UHS2 mode if need to reset cmd/data */
1046 	if ((mask & SDHCI_RESET_CMD) | (mask & SDHCI_RESET_DATA))
1047 		sdhci_gli_uhs2_reset_sd_tran(host);
1048 
1049 	if (mask & SDHCI_RESET_ALL)
1050 		host->clock = 0;
1051 
1052 	sdhci_gli_wait_software_reset_done(host, mask);
1053 }
1054 
gl9767_vhs_read(struct pci_dev * pdev)1055 static inline void gl9767_vhs_read(struct pci_dev *pdev)
1056 {
1057 	u32 vhs_enable;
1058 	u32 vhs_value;
1059 
1060 	pci_read_config_dword(pdev, PCIE_GLI_9767_VHS, &vhs_value);
1061 	vhs_enable = FIELD_GET(GLI_9767_VHS_REV, vhs_value);
1062 
1063 	if (vhs_enable == GLI_9767_VHS_REV_R)
1064 		return;
1065 
1066 	vhs_value &= ~GLI_9767_VHS_REV;
1067 	vhs_value |= FIELD_PREP(GLI_9767_VHS_REV, GLI_9767_VHS_REV_R);
1068 
1069 	pci_write_config_dword(pdev, PCIE_GLI_9767_VHS, vhs_value);
1070 }
1071 
gl9767_vhs_write(struct pci_dev * pdev)1072 static inline void gl9767_vhs_write(struct pci_dev *pdev)
1073 {
1074 	u32 vhs_enable;
1075 	u32 vhs_value;
1076 
1077 	pci_read_config_dword(pdev, PCIE_GLI_9767_VHS, &vhs_value);
1078 	vhs_enable = FIELD_GET(GLI_9767_VHS_REV, vhs_value);
1079 
1080 	if (vhs_enable == GLI_9767_VHS_REV_W)
1081 		return;
1082 
1083 	vhs_value &= ~GLI_9767_VHS_REV;
1084 	vhs_value |= FIELD_PREP(GLI_9767_VHS_REV, GLI_9767_VHS_REV_W);
1085 
1086 	pci_write_config_dword(pdev, PCIE_GLI_9767_VHS, vhs_value);
1087 }
1088 
gl9767_ssc_enable(struct pci_dev * pdev)1089 static bool gl9767_ssc_enable(struct pci_dev *pdev)
1090 {
1091 	u32 value;
1092 	u8 enable;
1093 
1094 	gl9767_vhs_write(pdev);
1095 
1096 	pci_read_config_dword(pdev, PCIE_GLI_9767_COM_MAILBOX, &value);
1097 	enable = FIELD_GET(PCIE_GLI_9767_COM_MAILBOX_SSC_EN, value);
1098 
1099 	gl9767_vhs_read(pdev);
1100 
1101 	return enable;
1102 }
1103 
gl9767_set_ssc(struct pci_dev * pdev,u8 enable,u8 step,u16 ppm)1104 static void gl9767_set_ssc(struct pci_dev *pdev, u8 enable, u8 step, u16 ppm)
1105 {
1106 	u32 pll;
1107 	u32 ssc;
1108 
1109 	gl9767_vhs_write(pdev);
1110 
1111 	pci_read_config_dword(pdev, PCIE_GLI_9767_SD_PLL_CTL, &pll);
1112 	pci_read_config_dword(pdev, PCIE_GLI_9767_SD_PLL_CTL2, &ssc);
1113 	pll &= ~(PCIE_GLI_9767_SD_PLL_CTL_SSC_STEP_SETTING |
1114 		 PCIE_GLI_9767_SD_PLL_CTL_SSC_EN);
1115 	ssc &= ~PCIE_GLI_9767_SD_PLL_CTL2_PLLSSC_PPM;
1116 	pll |= FIELD_PREP(PCIE_GLI_9767_SD_PLL_CTL_SSC_STEP_SETTING, step) |
1117 	       FIELD_PREP(PCIE_GLI_9767_SD_PLL_CTL_SSC_EN, enable);
1118 	ssc |= FIELD_PREP(PCIE_GLI_9767_SD_PLL_CTL2_PLLSSC_PPM, ppm);
1119 	pci_write_config_dword(pdev, PCIE_GLI_9767_SD_PLL_CTL2, ssc);
1120 	pci_write_config_dword(pdev, PCIE_GLI_9767_SD_PLL_CTL, pll);
1121 
1122 	gl9767_vhs_read(pdev);
1123 }
1124 
gl9767_set_pll(struct pci_dev * pdev,u8 dir,u16 ldiv,u8 pdiv)1125 static void gl9767_set_pll(struct pci_dev *pdev, u8 dir, u16 ldiv, u8 pdiv)
1126 {
1127 	u32 pll;
1128 
1129 	gl9767_vhs_write(pdev);
1130 
1131 	pci_read_config_dword(pdev, PCIE_GLI_9767_SD_PLL_CTL, &pll);
1132 	pll &= ~(PCIE_GLI_9767_SD_PLL_CTL_PLL_LDIV |
1133 		 PCIE_GLI_9767_SD_PLL_CTL_PLL_PDIV |
1134 		 PCIE_GLI_9767_SD_PLL_CTL_PLL_DIR_EN);
1135 	pll |= FIELD_PREP(PCIE_GLI_9767_SD_PLL_CTL_PLL_LDIV, ldiv) |
1136 	       FIELD_PREP(PCIE_GLI_9767_SD_PLL_CTL_PLL_PDIV, pdiv) |
1137 	       FIELD_PREP(PCIE_GLI_9767_SD_PLL_CTL_PLL_DIR_EN, dir);
1138 	pci_write_config_dword(pdev, PCIE_GLI_9767_SD_PLL_CTL, pll);
1139 
1140 	gl9767_vhs_read(pdev);
1141 
1142 	/* wait for pll stable */
1143 	usleep_range(1000, 1100);
1144 }
1145 
gl9767_set_ssc_pll_205mhz(struct pci_dev * pdev)1146 static void gl9767_set_ssc_pll_205mhz(struct pci_dev *pdev)
1147 {
1148 	bool enable = gl9767_ssc_enable(pdev);
1149 
1150 	/* set pll to 205MHz and ssc */
1151 	gl9767_set_ssc(pdev, enable, 0x1F, 0xF5C3);
1152 	gl9767_set_pll(pdev, 0x1, 0x246, 0x0);
1153 }
1154 
gl9767_disable_ssc_pll(struct pci_dev * pdev)1155 static void gl9767_disable_ssc_pll(struct pci_dev *pdev)
1156 {
1157 	u32 pll;
1158 
1159 	gl9767_vhs_write(pdev);
1160 
1161 	pci_read_config_dword(pdev, PCIE_GLI_9767_SD_PLL_CTL, &pll);
1162 	pll &= ~(PCIE_GLI_9767_SD_PLL_CTL_PLL_DIR_EN | PCIE_GLI_9767_SD_PLL_CTL_SSC_EN);
1163 	pci_write_config_dword(pdev, PCIE_GLI_9767_SD_PLL_CTL, pll);
1164 
1165 	gl9767_vhs_read(pdev);
1166 }
1167 
gl9767_set_low_power_negotiation(struct pci_dev * pdev,bool enable)1168 static void gl9767_set_low_power_negotiation(struct pci_dev *pdev, bool enable)
1169 {
1170 	u32 value;
1171 
1172 	gl9767_vhs_write(pdev);
1173 
1174 	pci_read_config_dword(pdev, PCIE_GLI_9767_CFG, &value);
1175 	if (enable)
1176 		value &= ~PCIE_GLI_9767_CFG_LOW_PWR_OFF;
1177 	else
1178 		value |= PCIE_GLI_9767_CFG_LOW_PWR_OFF;
1179 	pci_write_config_dword(pdev, PCIE_GLI_9767_CFG, value);
1180 
1181 	gl9767_vhs_read(pdev);
1182 }
1183 
sdhci_gl9767_uhs2_phy_reset(struct sdhci_host * host,bool assert)1184 static void sdhci_gl9767_uhs2_phy_reset(struct sdhci_host *host, bool assert)
1185 {
1186 	struct sdhci_pci_slot *slot = sdhci_priv(host);
1187 	struct pci_dev *pdev = slot->chip->pdev;
1188 	u32 value, set, clr;
1189 
1190 	if (assert) {
1191 		/* Assert reset, set RESETN and clean RESETN_VALUE */
1192 		set = PCIE_GLI_9767_UHS2_CTL2_FORCE_PHY_RESETN;
1193 		clr = PCIE_GLI_9767_UHS2_CTL2_FORCE_RESETN_VALUE;
1194 	} else {
1195 		/* De-assert reset, clean RESETN and set RESETN_VALUE */
1196 		set = PCIE_GLI_9767_UHS2_CTL2_FORCE_RESETN_VALUE;
1197 		clr = PCIE_GLI_9767_UHS2_CTL2_FORCE_PHY_RESETN;
1198 	}
1199 
1200 	gl9767_vhs_write(pdev);
1201 	pci_read_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL2, &value);
1202 	value |= set;
1203 	pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL2, value);
1204 	value &= ~clr;
1205 	pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL2, value);
1206 	gl9767_vhs_read(pdev);
1207 }
1208 
__gl9767_uhs2_set_power(struct sdhci_host * host,unsigned char mode,unsigned short vdd)1209 static void __gl9767_uhs2_set_power(struct sdhci_host *host, unsigned char mode, unsigned short vdd)
1210 {
1211 	u8 pwr = 0;
1212 
1213 	if (mode != MMC_POWER_OFF) {
1214 		pwr = sdhci_get_vdd_value(vdd);
1215 		if (!pwr)
1216 			WARN(1, "%s: Invalid vdd %#x\n",
1217 			     mmc_hostname(host->mmc), vdd);
1218 		pwr |= SDHCI_VDD2_POWER_180;
1219 	}
1220 
1221 	if (host->pwr == pwr)
1222 		return;
1223 
1224 	host->pwr = pwr;
1225 
1226 	if (pwr == 0) {
1227 		sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
1228 	} else {
1229 		sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
1230 
1231 		pwr |= SDHCI_POWER_ON;
1232 		sdhci_writeb(host, pwr & 0xf, SDHCI_POWER_CONTROL);
1233 		usleep_range(5000, 6250);
1234 
1235 		/* Assert reset */
1236 		sdhci_gl9767_uhs2_phy_reset(host, true);
1237 		pwr |= SDHCI_VDD2_POWER_ON;
1238 		sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
1239 		usleep_range(5000, 6250);
1240 	}
1241 }
1242 
sdhci_gl9767_set_clock(struct sdhci_host * host,unsigned int clock)1243 static void sdhci_gl9767_set_clock(struct sdhci_host *host, unsigned int clock)
1244 {
1245 	struct sdhci_pci_slot *slot = sdhci_priv(host);
1246 	struct mmc_ios *ios = &host->mmc->ios;
1247 	struct pci_dev *pdev;
1248 	u16 clk;
1249 
1250 	pdev = slot->chip->pdev;
1251 	host->mmc->actual_clock = 0;
1252 
1253 	gl9767_set_low_power_negotiation(pdev, false);
1254 	gl9767_disable_ssc_pll(pdev);
1255 	sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
1256 
1257 	if (clock == 0) {
1258 		gl9767_set_low_power_negotiation(pdev, true);
1259 		return;
1260 	}
1261 
1262 	clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock);
1263 	if (clock == 200000000 && ios->timing == MMC_TIMING_UHS_SDR104) {
1264 		host->mmc->actual_clock = 205000000;
1265 		gl9767_set_ssc_pll_205mhz(pdev);
1266 	}
1267 
1268 	sdhci_enable_clk(host, clk);
1269 
1270 	if (mmc_card_uhs2(host->mmc))
1271 		/* De-assert reset */
1272 		sdhci_gl9767_uhs2_phy_reset(host, false);
1273 
1274 	gl9767_set_low_power_negotiation(pdev, true);
1275 }
1276 
sdhci_gl9767_set_card_detect_debounce_time(struct sdhci_host * host)1277 static void sdhci_gl9767_set_card_detect_debounce_time(struct sdhci_host *host)
1278 {
1279 	u32 value;
1280 
1281 	value = sdhci_readl(host, SDHCI_GLI_9767_SD_HOST_OPERATION_CTL);
1282 	value &= ~(SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE |
1283 		   SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE);
1284 	if (sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)
1285 		value |= FIELD_PREP(SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE,
1286 				    SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_PLUG_IN_VALUE) |
1287 			 FIELD_PREP(SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE,
1288 				    SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE_1MS);
1289 	else
1290 		value |= FIELD_PREP(SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE,
1291 				    SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_PLUG_OUT_VALUE) |
1292 			 FIELD_PREP(SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE,
1293 				    SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_DEBOUNCE_SCALE_10MS);
1294 	sdhci_writel(host, value, SDHCI_GLI_9767_SD_HOST_OPERATION_CTL);
1295 }
1296 
sdhci_gl9767_card_event(struct sdhci_host * host)1297 static void sdhci_gl9767_card_event(struct sdhci_host *host)
1298 {
1299 	sdhci_gl9767_set_card_detect_debounce_time(host);
1300 }
1301 
gli_set_9767(struct sdhci_host * host)1302 static void gli_set_9767(struct sdhci_host *host)
1303 {
1304 	u32 value;
1305 
1306 	value = sdhci_readl(host, SDHCI_GLI_9767_GM_BURST_SIZE);
1307 	value &= ~SDHCI_GLI_9767_GM_BURST_SIZE_AXI_ALWAYS_SET;
1308 	sdhci_writel(host, value, SDHCI_GLI_9767_GM_BURST_SIZE);
1309 
1310 	value = sdhci_readl(host, SDHCI_GLI_9767_SD_HOST_OPERATION_CTL);
1311 	value &= ~SDHCI_GLI_9767_SD_HOST_OPERATION_CTL_CMD_CONFLICT_CHECK;
1312 	sdhci_writel(host, value, SDHCI_GLI_9767_SD_HOST_OPERATION_CTL);
1313 
1314 	sdhci_gl9767_set_card_detect_debounce_time(host);
1315 }
1316 
gl9767_hw_setting(struct sdhci_pci_slot * slot)1317 static void gl9767_hw_setting(struct sdhci_pci_slot *slot)
1318 {
1319 	struct pci_dev *pdev = slot->chip->pdev;
1320 	u32 value;
1321 
1322 	gl9767_vhs_write(pdev);
1323 
1324 	pci_read_config_dword(pdev, PCIE_GLI_9767_PWR_MACRO_CTL, &value);
1325 	value &= ~(PCIE_GLI_9767_PWR_MACRO_CTL_LOW_VOLTAGE |
1326 		   PCIE_GLI_9767_PWR_MACRO_CTL_LD0_LOW_OUTPUT_VOLTAGE |
1327 		   PCIE_GLI_9767_PWR_MACRO_CTL_RCLK_AMPLITUDE_CTL);
1328 
1329 	value |= PCIE_GLI_9767_PWR_MACRO_CTL_LOW_VOLTAGE |
1330 		 FIELD_PREP(PCIE_GLI_9767_PWR_MACRO_CTL_LD0_LOW_OUTPUT_VOLTAGE,
1331 			    PCIE_GLI_9767_PWR_MACRO_CTL_LD0_LOW_OUTPUT_VOLTAGE_VALUE) |
1332 		 FIELD_PREP(PCIE_GLI_9767_PWR_MACRO_CTL_RCLK_AMPLITUDE_CTL,
1333 			    PCIE_GLI_9767_PWR_MACRO_CTL_RCLK_AMPLITUDE_CTL_VALUE);
1334 	pci_write_config_dword(pdev, PCIE_GLI_9767_PWR_MACRO_CTL, value);
1335 
1336 	pci_read_config_dword(pdev, PCIE_GLI_9767_SCR, &value);
1337 	value &= ~(PCIE_GLI_9767_SCR_SYSTEM_CLK_SELECT_MODE0 |
1338 		   PCIE_GLI_9767_SCR_SYSTEM_CLK_SELECT_MODE1 |
1339 		   PCIE_GLI_9767_SCR_CFG_RST_DATA_LINK_DOWN);
1340 
1341 	value |= PCIE_GLI_9767_SCR_AUTO_AXI_W_BURST |
1342 		 PCIE_GLI_9767_SCR_AUTO_AXI_R_BURST |
1343 		 PCIE_GLI_9767_SCR_AXI_REQ |
1344 		 PCIE_GLI_9767_SCR_CARD_DET_PWR_SAVING_EN |
1345 		 PCIE_GLI_9767_SCR_CORE_PWR_D3_OFF;
1346 	pci_write_config_dword(pdev, PCIE_GLI_9767_SCR, value);
1347 
1348 	gl9767_vhs_read(pdev);
1349 }
1350 
sdhci_gl9767_reset(struct sdhci_host * host,u8 mask)1351 static void sdhci_gl9767_reset(struct sdhci_host *host, u8 mask)
1352 {
1353 	struct sdhci_pci_slot *slot = sdhci_priv(host);
1354 	struct pci_dev *pdev = slot->chip->pdev;
1355 	u32 value;
1356 
1357 	/* need internal clock */
1358 	if (mask & SDHCI_RESET_ALL) {
1359 		sdhci_gli_enable_internal_clock(host);
1360 
1361 		gl9767_vhs_write(pdev);
1362 
1363 		pci_read_config_dword(pdev, PCIE_GLI_9767_RESET_REG, &value);
1364 		value &= ~PCIE_GLI_9767_RESET_REG_SD_HOST_SW_RESET;
1365 		pci_write_config_dword(pdev, PCIE_GLI_9767_RESET_REG, value);
1366 
1367 		if (read_poll_timeout_atomic(pci_read_config_dword, value,
1368 					     !(value & PCIE_GLI_9767_RESET_REG_SD_HOST_SW_RESET),
1369 					     1, 5, true, pdev, PCIE_GLI_9767_RESET_REG, &value)) {
1370 			pr_warn("%s: %s: Reset SDHC AHB and TL-AMBA failure.\n",
1371 				__func__, mmc_hostname(host->mmc));
1372 			gl9767_vhs_read(pdev);
1373 			return;
1374 		}
1375 		gl9767_vhs_read(pdev);
1376 	}
1377 
1378 	if (mmc_card_uhs2(host->mmc)) {
1379 		if (mask & (SDHCI_RESET_CMD | SDHCI_RESET_DATA)) {
1380 			sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
1381 			sdhci_gli_uhs2_reset_sd_tran(host);
1382 			sdhci_gli_wait_software_reset_done(host, mask);
1383 		} else {
1384 			sdhci_uhs2_reset(host, mask);
1385 		}
1386 	} else {
1387 		sdhci_reset(host, mask);
1388 	}
1389 
1390 	gli_set_9767(host);
1391 }
1392 
gl9767_init_sd_express(struct mmc_host * mmc,struct mmc_ios * ios)1393 static int gl9767_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios)
1394 {
1395 	struct sdhci_host *host = mmc_priv(mmc);
1396 	struct sdhci_pci_slot *slot = sdhci_priv(host);
1397 	struct pci_dev *pdev;
1398 	u32 value;
1399 	int i;
1400 
1401 	pdev = slot->chip->pdev;
1402 
1403 	if (mmc->ops->get_ro(mmc)) {
1404 		mmc->ios.timing &= ~(MMC_TIMING_SD_EXP | MMC_TIMING_SD_EXP_1_2V);
1405 		return 0;
1406 	}
1407 
1408 	gl9767_vhs_write(pdev);
1409 
1410 	pci_read_config_dword(pdev, PCIE_GLI_9767_COMBO_MUX_CTL, &value);
1411 	value &= ~(PCIE_GLI_9767_COMBO_MUX_CTL_RST_EN | PCIE_GLI_9767_COMBO_MUX_CTL_WAIT_PERST_EN);
1412 	pci_write_config_dword(pdev, PCIE_GLI_9767_COMBO_MUX_CTL, value);
1413 
1414 	pci_read_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, &value);
1415 	value &= ~PCIE_GLI_9767_SD_DATA_MULTI_CTL_DISCONNECT_TIME;
1416 	value |= FIELD_PREP(PCIE_GLI_9767_SD_DATA_MULTI_CTL_DISCONNECT_TIME,
1417 			    PCIE_GLI_9767_SD_DATA_MULTI_CTL_DISCONNECT_TIME_VALUE);
1418 	pci_write_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, value);
1419 
1420 	pci_read_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2, &value);
1421 	value |= PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2_SDEI_COMPLETE;
1422 	pci_write_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2, value);
1423 
1424 	pci_read_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_EN_REG2, &value);
1425 	value |= PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_EN_REG2_SDEI_COMPLETE_STATUS_EN;
1426 	pci_write_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_EN_REG2, value);
1427 
1428 	pci_read_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_SIGNAL_EN_REG2, &value);
1429 	value |= PCIE_GLI_9767_NORMAL_ERR_INT_SIGNAL_EN_REG2_SDEI_COMPLETE_SIGNAL_EN;
1430 	pci_write_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_SIGNAL_EN_REG2, value);
1431 
1432 	pci_read_config_dword(pdev, PCIE_GLI_9767_CFG, &value);
1433 	value |= PCIE_GLI_9767_CFG_LOW_PWR_OFF;
1434 	pci_write_config_dword(pdev, PCIE_GLI_9767_CFG, value);
1435 
1436 	value = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1437 	value &= ~(SDHCI_CLOCK_CARD_EN | SDHCI_CLOCK_PLL_EN);
1438 	sdhci_writew(host, value, SDHCI_CLOCK_CONTROL);
1439 
1440 	value = sdhci_readb(host, SDHCI_POWER_CONTROL);
1441 	value |= (SDHCI_VDD2_POWER_180 | SDHCI_VDD2_POWER_ON);
1442 	sdhci_writeb(host, value, SDHCI_POWER_CONTROL);
1443 
1444 	pci_read_config_dword(pdev, PCIE_GLI_9767_SD_EXPRESS_CTL, &value);
1445 	value |= PCIE_GLI_9767_SD_EXPRESS_CTL_SDEI_EXE;
1446 	pci_write_config_dword(pdev, PCIE_GLI_9767_SD_EXPRESS_CTL, value);
1447 
1448 	for (i = 0; i < 2; i++) {
1449 		usleep_range(10000, 10100);
1450 		pci_read_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2, &value);
1451 		if (value & PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2_SDEI_COMPLETE) {
1452 			pci_write_config_dword(pdev, PCIE_GLI_9767_NORMAL_ERR_INT_STATUS_REG2,
1453 					       value);
1454 			break;
1455 		}
1456 	}
1457 
1458 	pci_read_config_dword(pdev, PCIE_GLI_9767_SDHC_CAP, &value);
1459 	if (value & PCIE_GLI_9767_SDHC_CAP_SDEI_RESULT) {
1460 		pci_read_config_dword(pdev, PCIE_GLI_9767_SD_EXPRESS_CTL, &value);
1461 		value |= PCIE_GLI_9767_SD_EXPRESS_CTL_SD_EXPRESS_MODE;
1462 		pci_write_config_dword(pdev, PCIE_GLI_9767_SD_EXPRESS_CTL, value);
1463 	} else {
1464 		mmc->ios.timing &= ~(MMC_TIMING_SD_EXP | MMC_TIMING_SD_EXP_1_2V);
1465 
1466 		value = sdhci_readb(host, SDHCI_POWER_CONTROL);
1467 		value &= ~(SDHCI_VDD2_POWER_180 | SDHCI_VDD2_POWER_ON);
1468 		sdhci_writeb(host, value, SDHCI_POWER_CONTROL);
1469 
1470 		value = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1471 		value |= (SDHCI_CLOCK_CARD_EN | SDHCI_CLOCK_PLL_EN);
1472 		sdhci_writew(host, value, SDHCI_CLOCK_CONTROL);
1473 	}
1474 
1475 	pci_read_config_dword(pdev, PCIE_GLI_9767_CFG, &value);
1476 	value &= ~PCIE_GLI_9767_CFG_LOW_PWR_OFF;
1477 	pci_write_config_dword(pdev, PCIE_GLI_9767_CFG, value);
1478 	gl9767_vhs_read(pdev);
1479 
1480 	return 0;
1481 }
1482 
gl9767_vendor_init(struct sdhci_host * host)1483 static void gl9767_vendor_init(struct sdhci_host *host)
1484 {
1485 	struct sdhci_pci_slot *slot = sdhci_priv(host);
1486 	struct pci_dev *pdev = slot->chip->pdev;
1487 	u32 value;
1488 
1489 	gl9767_vhs_write(pdev);
1490 
1491 	pci_read_config_dword(pdev, PCIE_GLI_9767_UHS2_PHY_SET_REG1, &value);
1492 	value |= FIELD_PREP(PCIE_GLI_9767_UHS2_PHY_SET_REG1_SERDES_INTR,
1493 			    PCIE_GLI_9767_UHS2_PHY_SET_REG1_SERDES_INTR_VALUE);
1494 	pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_PHY_SET_REG1, value);
1495 
1496 	pci_read_config_dword(pdev, PCIE_GLI_9767_UHS2_PHY_SET_REG2, &value);
1497 	value |= FIELD_PREP(PCIE_GLI_9767_UHS2_PHY_SET_REG2_SSC_PPM_SETTING,
1498 			    PCIE_GLI_9767_UHS2_PHY_SET_REG2_SSC_PPM_SETTING_VALUE);
1499 	pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_PHY_SET_REG2, value);
1500 
1501 	pci_read_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL1, &value);
1502 	value |= FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_TRANS_PASS,
1503 			    PCIE_GLI_9767_UHS2_CTL1_TRANS_PASS_VALUE) |
1504 		 FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_DECODING_CTL,
1505 			    PCIE_GLI_9767_UHS2_CTL1_DECODING_CTL_VALUE) |
1506 		 FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_SERDES_TRAN,
1507 			    PCIE_GLI_9767_UHS2_CTL1_SERDES_TRAN_VALUE) |
1508 		 FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_SERDES_RECV,
1509 			    PCIE_GLI_9767_UHS2_CTL1_SERDES_RECV_VALUE) |
1510 		 FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_DIR_TRANS,
1511 			    PCIE_GLI_9767_UHS2_CTL1_DIR_TRANS_VALUE) |
1512 		 FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_DIR_RECV,
1513 			    PCIE_GLI_9767_UHS2_CTL1_DIR_RECV_VALUE) |
1514 		 FIELD_PREP(PCIE_GLI_9767_UHS2_CTL1_PDRST,
1515 			    PCIE_GLI_9767_UHS2_CTL1_PDRST_VALUE);
1516 	pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL1, value);
1517 
1518 	pci_read_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL2, &value);
1519 	value |= FIELD_PREP(PCIE_GLI_9767_UHS2_CTL2_ZC,
1520 			    PCIE_GLI_9767_UHS2_CTL2_ZC_VALUE) |
1521 		 FIELD_PREP(PCIE_GLI_9767_UHS2_CTL2_ZC_CTL,
1522 			    PCIE_GLI_9767_UHS2_CTL2_ZC_CTL_VALUE);
1523 	pci_write_config_dword(pdev, PCIE_GLI_9767_UHS2_CTL2, value);
1524 
1525 	gl9767_vhs_read(pdev);
1526 }
1527 
sdhci_gl9767_set_power(struct sdhci_host * host,unsigned char mode,unsigned short vdd)1528 static void sdhci_gl9767_set_power(struct sdhci_host *host, unsigned char mode,	unsigned short vdd)
1529 {
1530 	struct sdhci_pci_slot *slot = sdhci_priv(host);
1531 	struct pci_dev *pdev = slot->chip->pdev;
1532 	u32 value;
1533 
1534 	if (mmc_card_uhs2(host->mmc)) {
1535 		gl9767_vhs_write(pdev);
1536 
1537 		pci_read_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, &value);
1538 		value |= PCIE_GLI_9767_SD_DATA_MULTI_CTL_SELECT_UHS2 |
1539 			 PCIE_GLI_9767_SD_DATA_MULTI_CTL_UHS2_SWITCH_CTL;
1540 		pci_write_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, value);
1541 
1542 		gl9767_vhs_read(pdev);
1543 
1544 		sdhci_gli_overcurrent_event_enable(host, false);
1545 		__gl9767_uhs2_set_power(host, mode, vdd);
1546 		sdhci_gli_overcurrent_event_enable(host, true);
1547 	} else {
1548 		gl9767_vhs_write(pdev);
1549 
1550 		pci_read_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, &value);
1551 		value &= ~(PCIE_GLI_9767_SD_DATA_MULTI_CTL_SELECT_UHS2 |
1552 			   PCIE_GLI_9767_SD_DATA_MULTI_CTL_UHS2_SWITCH_CTL);
1553 		pci_write_config_dword(pdev, PCIE_GLI_9767_SD_DATA_MULTI_CTL, value);
1554 
1555 		gl9767_vhs_read(pdev);
1556 
1557 		sdhci_gli_overcurrent_event_enable(host, false);
1558 		sdhci_set_power(host, mode, vdd);
1559 		sdhci_gli_overcurrent_event_enable(host, true);
1560 	}
1561 }
1562 
gli_probe_slot_gl9750(struct sdhci_pci_slot * slot)1563 static int gli_probe_slot_gl9750(struct sdhci_pci_slot *slot)
1564 {
1565 	struct sdhci_host *host = slot->host;
1566 
1567 	gl9750_hw_setting(host);
1568 	gli_pcie_enable_msi(slot);
1569 	slot->host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
1570 	sdhci_enable_v4_mode(host);
1571 
1572 	return 0;
1573 }
1574 
gli_probe_slot_gl9755(struct sdhci_pci_slot * slot)1575 static int gli_probe_slot_gl9755(struct sdhci_pci_slot *slot)
1576 {
1577 	struct sdhci_host *host = slot->host;
1578 
1579 	gl9755_hw_setting(slot);
1580 	gli_pcie_enable_msi(slot);
1581 	slot->host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
1582 	sdhci_enable_v4_mode(host);
1583 	gl9755_vendor_init(host);
1584 
1585 	return 0;
1586 }
1587 
gli_probe_slot_gl9767(struct sdhci_pci_slot * slot)1588 static int gli_probe_slot_gl9767(struct sdhci_pci_slot *slot)
1589 {
1590 	struct sdhci_host *host = slot->host;
1591 
1592 	gli_set_9767(host);
1593 	gl9767_hw_setting(slot);
1594 	gli_pcie_enable_msi(slot);
1595 	slot->host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
1596 	host->mmc->caps2 |= MMC_CAP2_SD_EXP;
1597 	host->mmc_host_ops.init_sd_express = gl9767_init_sd_express;
1598 	sdhci_enable_v4_mode(host);
1599 	gl9767_vendor_init(host);
1600 
1601 	return 0;
1602 }
1603 
sdhci_gli_voltage_switch(struct sdhci_host * host)1604 static void sdhci_gli_voltage_switch(struct sdhci_host *host)
1605 {
1606 	/*
1607 	 * According to Section 3.6.1 signal voltage switch procedure in
1608 	 * SD Host Controller Simplified Spec. 4.20, steps 6~8 are as
1609 	 * follows:
1610 	 * (6) Set 1.8V Signal Enable in the Host Control 2 register.
1611 	 * (7) Wait 5ms. 1.8V voltage regulator shall be stable within this
1612 	 *     period.
1613 	 * (8) If 1.8V Signal Enable is cleared by Host Controller, go to
1614 	 *     step (12).
1615 	 *
1616 	 * Wait 5ms after set 1.8V signal enable in Host Control 2 register
1617 	 * to ensure 1.8V signal enable bit is set by GL9750/GL9755.
1618 	 *
1619 	 * ...however, the controller in the NUC10i3FNK4 (a 9755) requires
1620 	 * slightly longer than 5ms before the control register reports that
1621 	 * 1.8V is ready, and far longer still before the card will actually
1622 	 * work reliably.
1623 	 */
1624 	usleep_range(100000, 110000);
1625 }
1626 
sdhci_gl9767_voltage_switch(struct sdhci_host * host)1627 static void sdhci_gl9767_voltage_switch(struct sdhci_host *host)
1628 {
1629 	/*
1630 	 * According to Section 3.6.1 signal voltage switch procedure in
1631 	 * SD Host Controller Simplified Spec. 4.20, steps 6~8 are as
1632 	 * follows:
1633 	 * (6) Set 1.8V Signal Enable in the Host Control 2 register.
1634 	 * (7) Wait 5ms. 1.8V voltage regulator shall be stable within this
1635 	 *     period.
1636 	 * (8) If 1.8V Signal Enable is cleared by Host Controller, go to
1637 	 *     step (12).
1638 	 *
1639 	 * Wait 5ms after set 1.8V signal enable in Host Control 2 register
1640 	 * to ensure 1.8V signal enable bit is set by GL9767.
1641 	 *
1642 	 */
1643 	usleep_range(5000, 5500);
1644 }
1645 
sdhci_gl9750_reset(struct sdhci_host * host,u8 mask)1646 static void sdhci_gl9750_reset(struct sdhci_host *host, u8 mask)
1647 {
1648 	sdhci_reset(host, mask);
1649 	gli_set_9750(host);
1650 }
1651 
sdhci_gl9750_readl(struct sdhci_host * host,int reg)1652 static u32 sdhci_gl9750_readl(struct sdhci_host *host, int reg)
1653 {
1654 	u32 value;
1655 
1656 	value = readl(host->ioaddr + reg);
1657 	if (unlikely(reg == SDHCI_MAX_CURRENT && !(value & 0xff)))
1658 		value |= 0xc8;
1659 
1660 	return value;
1661 }
1662 
gl9763e_hs400_enhanced_strobe(struct mmc_host * mmc,struct mmc_ios * ios)1663 static void gl9763e_hs400_enhanced_strobe(struct mmc_host *mmc,
1664 					  struct mmc_ios *ios)
1665 {
1666 	struct sdhci_host *host = mmc_priv(mmc);
1667 	u32 val;
1668 
1669 	val = sdhci_readl(host, SDHCI_GLI_9763E_HS400_ES_REG);
1670 	if (ios->enhanced_strobe)
1671 		val |= SDHCI_GLI_9763E_HS400_ES_BIT;
1672 	else
1673 		val &= ~SDHCI_GLI_9763E_HS400_ES_BIT;
1674 
1675 	sdhci_writel(host, val, SDHCI_GLI_9763E_HS400_ES_REG);
1676 }
1677 
gl9763e_set_low_power_negotiation(struct sdhci_pci_slot * slot,bool enable)1678 static void gl9763e_set_low_power_negotiation(struct sdhci_pci_slot *slot,
1679 					      bool enable)
1680 {
1681 	struct pci_dev *pdev = slot->chip->pdev;
1682 	u32 value;
1683 
1684 	pci_read_config_dword(pdev, PCIE_GLI_9763E_VHS, &value);
1685 	value &= ~GLI_9763E_VHS_REV;
1686 	value |= FIELD_PREP(GLI_9763E_VHS_REV, GLI_9763E_VHS_REV_W);
1687 	pci_write_config_dword(pdev, PCIE_GLI_9763E_VHS, value);
1688 
1689 	pci_read_config_dword(pdev, PCIE_GLI_9763E_CFG, &value);
1690 
1691 	if (enable)
1692 		value &= ~GLI_9763E_CFG_LPSN_DIS;
1693 	else
1694 		value |= GLI_9763E_CFG_LPSN_DIS;
1695 
1696 	pci_write_config_dword(pdev, PCIE_GLI_9763E_CFG, value);
1697 
1698 	pci_read_config_dword(pdev, PCIE_GLI_9763E_VHS, &value);
1699 	value &= ~GLI_9763E_VHS_REV;
1700 	value |= FIELD_PREP(GLI_9763E_VHS_REV, GLI_9763E_VHS_REV_R);
1701 	pci_write_config_dword(pdev, PCIE_GLI_9763E_VHS, value);
1702 }
1703 
sdhci_set_gl9763e_signaling(struct sdhci_host * host,unsigned int timing)1704 static void sdhci_set_gl9763e_signaling(struct sdhci_host *host,
1705 					unsigned int timing)
1706 {
1707 	u16 ctrl_2;
1708 
1709 	ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
1710 	ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
1711 	if (timing == MMC_TIMING_MMC_HS200)
1712 		ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
1713 	else if (timing == MMC_TIMING_MMC_HS)
1714 		ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
1715 	else if (timing == MMC_TIMING_MMC_DDR52)
1716 		ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
1717 	else if (timing == MMC_TIMING_MMC_HS400)
1718 		ctrl_2 |= SDHCI_GLI_9763E_CTRL_HS400;
1719 
1720 	sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
1721 }
1722 
sdhci_gl9763e_dumpregs(struct mmc_host * mmc)1723 static void sdhci_gl9763e_dumpregs(struct mmc_host *mmc)
1724 {
1725 	sdhci_dumpregs(mmc_priv(mmc));
1726 }
1727 
sdhci_gl9763e_cqe_pre_enable(struct mmc_host * mmc)1728 static void sdhci_gl9763e_cqe_pre_enable(struct mmc_host *mmc)
1729 {
1730 	struct cqhci_host *cq_host = mmc->cqe_private;
1731 	u32 value;
1732 
1733 	value = cqhci_readl(cq_host, CQHCI_CFG);
1734 	value |= CQHCI_ENABLE;
1735 	cqhci_writel(cq_host, value, CQHCI_CFG);
1736 }
1737 
sdhci_gl9763e_cqe_enable(struct mmc_host * mmc)1738 static void sdhci_gl9763e_cqe_enable(struct mmc_host *mmc)
1739 {
1740 	struct sdhci_host *host = mmc_priv(mmc);
1741 
1742 	sdhci_writew(host, GLI_9763E_CQE_TRNS_MODE, SDHCI_TRANSFER_MODE);
1743 	sdhci_cqe_enable(mmc);
1744 }
1745 
sdhci_gl9763e_cqhci_irq(struct sdhci_host * host,u32 intmask)1746 static u32 sdhci_gl9763e_cqhci_irq(struct sdhci_host *host, u32 intmask)
1747 {
1748 	int cmd_error = 0;
1749 	int data_error = 0;
1750 
1751 	if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
1752 		return intmask;
1753 
1754 	cqhci_irq(host->mmc, intmask, cmd_error, data_error);
1755 
1756 	return 0;
1757 }
1758 
sdhci_gl9763e_cqe_post_disable(struct mmc_host * mmc)1759 static void sdhci_gl9763e_cqe_post_disable(struct mmc_host *mmc)
1760 {
1761 	struct sdhci_host *host = mmc_priv(mmc);
1762 	struct cqhci_host *cq_host = mmc->cqe_private;
1763 	u32 value;
1764 
1765 	value = cqhci_readl(cq_host, CQHCI_CFG);
1766 	value &= ~CQHCI_ENABLE;
1767 	cqhci_writel(cq_host, value, CQHCI_CFG);
1768 	sdhci_writew(host, 0x0, SDHCI_TRANSFER_MODE);
1769 }
1770 
1771 static const struct cqhci_host_ops sdhci_gl9763e_cqhci_ops = {
1772 	.enable         = sdhci_gl9763e_cqe_enable,
1773 	.disable        = sdhci_cqe_disable,
1774 	.dumpregs       = sdhci_gl9763e_dumpregs,
1775 	.pre_enable     = sdhci_gl9763e_cqe_pre_enable,
1776 	.post_disable   = sdhci_gl9763e_cqe_post_disable,
1777 };
1778 
gl9763e_add_host(struct sdhci_pci_slot * slot)1779 static int gl9763e_add_host(struct sdhci_pci_slot *slot)
1780 {
1781 	struct device *dev = &slot->chip->pdev->dev;
1782 	struct sdhci_host *host = slot->host;
1783 	struct cqhci_host *cq_host;
1784 	bool dma64;
1785 	int ret;
1786 
1787 	ret = sdhci_setup_host(host);
1788 	if (ret)
1789 		return ret;
1790 
1791 	cq_host = devm_kzalloc(dev, sizeof(*cq_host), GFP_KERNEL);
1792 	if (!cq_host) {
1793 		ret = -ENOMEM;
1794 		goto cleanup;
1795 	}
1796 
1797 	cq_host->mmio = host->ioaddr + SDHCI_GLI_9763E_CQE_BASE_ADDR;
1798 	cq_host->ops = &sdhci_gl9763e_cqhci_ops;
1799 
1800 	dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
1801 	if (dma64)
1802 		cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
1803 
1804 	ret = cqhci_init(cq_host, host->mmc, dma64);
1805 	if (ret)
1806 		goto cleanup;
1807 
1808 	ret = __sdhci_add_host(host);
1809 	if (ret)
1810 		goto cleanup;
1811 
1812 	/* Disable LPM negotiation to avoid entering L1 state. */
1813 	gl9763e_set_low_power_negotiation(slot, false);
1814 
1815 	return 0;
1816 
1817 cleanup:
1818 	sdhci_cleanup_host(host);
1819 	return ret;
1820 }
1821 
gl9763e_hw_setting(struct sdhci_pci_slot * slot)1822 static void gl9763e_hw_setting(struct sdhci_pci_slot *slot)
1823 {
1824 	struct pci_dev *pdev = slot->chip->pdev;
1825 	u32 value;
1826 
1827 	pci_read_config_dword(pdev, PCIE_GLI_9763E_VHS, &value);
1828 	value &= ~GLI_9763E_VHS_REV;
1829 	value |= FIELD_PREP(GLI_9763E_VHS_REV, GLI_9763E_VHS_REV_W);
1830 	pci_write_config_dword(pdev, PCIE_GLI_9763E_VHS, value);
1831 
1832 	pci_read_config_dword(pdev, PCIE_GLI_9763E_SCR, &value);
1833 	value |= GLI_9763E_SCR_AXI_REQ;
1834 	pci_write_config_dword(pdev, PCIE_GLI_9763E_SCR, value);
1835 
1836 	pci_read_config_dword(pdev, PCIE_GLI_9763E_MMC_CTRL, &value);
1837 	value &= ~GLI_9763E_HS400_SLOW;
1838 	pci_write_config_dword(pdev, PCIE_GLI_9763E_MMC_CTRL, value);
1839 
1840 	pci_read_config_dword(pdev, PCIE_GLI_9763E_CFG2, &value);
1841 	value &= ~GLI_9763E_CFG2_L1DLY;
1842 	/* set ASPM L1 entry delay to 21us */
1843 	value |= FIELD_PREP(GLI_9763E_CFG2_L1DLY, GLI_9763E_CFG2_L1DLY_MID);
1844 	pci_write_config_dword(pdev, PCIE_GLI_9763E_CFG2, value);
1845 
1846 	pci_read_config_dword(pdev, PCIE_GLI_9763E_CLKRXDLY, &value);
1847 	value &= ~GLI_9763E_HS400_RXDLY;
1848 	value |= FIELD_PREP(GLI_9763E_HS400_RXDLY, GLI_9763E_HS400_RXDLY_5);
1849 	pci_write_config_dword(pdev, PCIE_GLI_9763E_CLKRXDLY, value);
1850 
1851 	/* mask the replay timer timeout of AER */
1852 	sdhci_gli_mask_replay_timer_timeout(pdev);
1853 
1854 	pci_read_config_dword(pdev, PCIE_GLI_9763E_VHS, &value);
1855 	value &= ~GLI_9763E_VHS_REV;
1856 	value |= FIELD_PREP(GLI_9763E_VHS_REV, GLI_9763E_VHS_REV_R);
1857 	pci_write_config_dword(pdev, PCIE_GLI_9763E_VHS, value);
1858 }
1859 
1860 #ifdef CONFIG_PM
gl9763e_runtime_suspend(struct sdhci_pci_chip * chip)1861 static int gl9763e_runtime_suspend(struct sdhci_pci_chip *chip)
1862 {
1863 	struct sdhci_pci_slot *slot = chip->slots[0];
1864 	struct sdhci_host *host = slot->host;
1865 	u16 clock;
1866 
1867 	/* Enable LPM negotiation to allow entering L1 state */
1868 	gl9763e_set_low_power_negotiation(slot, true);
1869 
1870 	clock = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1871 	clock &= ~(SDHCI_CLOCK_PLL_EN | SDHCI_CLOCK_CARD_EN);
1872 	sdhci_writew(host, clock, SDHCI_CLOCK_CONTROL);
1873 
1874 	return 0;
1875 }
1876 
gl9763e_runtime_resume(struct sdhci_pci_chip * chip)1877 static int gl9763e_runtime_resume(struct sdhci_pci_chip *chip)
1878 {
1879 	struct sdhci_pci_slot *slot = chip->slots[0];
1880 	struct sdhci_host *host = slot->host;
1881 	u16 clock;
1882 
1883 	if (host->mmc->ios.power_mode != MMC_POWER_ON)
1884 		return 0;
1885 
1886 	clock = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
1887 
1888 	clock |= SDHCI_CLOCK_PLL_EN;
1889 	clock &= ~SDHCI_CLOCK_INT_STABLE;
1890 	sdhci_writew(host, clock, SDHCI_CLOCK_CONTROL);
1891 
1892 	/* Wait max 150 ms */
1893 	if (read_poll_timeout(sdhci_readw, clock, (clock & SDHCI_CLOCK_INT_STABLE),
1894 			      1000, 150000, false, host, SDHCI_CLOCK_CONTROL)) {
1895 		pr_err("%s: PLL clock never stabilised.\n",
1896 		       mmc_hostname(host->mmc));
1897 		sdhci_dumpregs(host);
1898 	}
1899 
1900 	clock |= SDHCI_CLOCK_CARD_EN;
1901 	sdhci_writew(host, clock, SDHCI_CLOCK_CONTROL);
1902 
1903 	/* Disable LPM negotiation to avoid entering L1 state. */
1904 	gl9763e_set_low_power_negotiation(slot, false);
1905 
1906 	return 0;
1907 }
1908 #endif
1909 
1910 #ifdef CONFIG_PM_SLEEP
sdhci_pci_gli_resume(struct sdhci_pci_chip * chip)1911 static int sdhci_pci_gli_resume(struct sdhci_pci_chip *chip)
1912 {
1913 	struct sdhci_pci_slot *slot = chip->slots[0];
1914 
1915 	pci_free_irq_vectors(slot->chip->pdev);
1916 	gli_pcie_enable_msi(slot);
1917 
1918 	return sdhci_pci_resume_host(chip);
1919 }
1920 
gl9763e_resume(struct sdhci_pci_chip * chip)1921 static int gl9763e_resume(struct sdhci_pci_chip *chip)
1922 {
1923 	struct sdhci_pci_slot *slot = chip->slots[0];
1924 	int ret;
1925 
1926 	ret = sdhci_pci_gli_resume(chip);
1927 	if (ret)
1928 		return ret;
1929 
1930 	ret = cqhci_resume(slot->host->mmc);
1931 	if (ret)
1932 		return ret;
1933 
1934 	/*
1935 	 * Disable LPM negotiation to bring device back in sync
1936 	 * with its runtime_pm state.
1937 	 */
1938 	gl9763e_set_low_power_negotiation(slot, false);
1939 
1940 	return 0;
1941 }
1942 
gl9763e_suspend(struct sdhci_pci_chip * chip)1943 static int gl9763e_suspend(struct sdhci_pci_chip *chip)
1944 {
1945 	struct sdhci_pci_slot *slot = chip->slots[0];
1946 	int ret;
1947 
1948 	/*
1949 	 * Certain SoCs can suspend only with the bus in low-
1950 	 * power state, notably x86 SoCs when using S0ix.
1951 	 * Re-enable LPM negotiation to allow entering L1 state
1952 	 * and entering system suspend.
1953 	 */
1954 	gl9763e_set_low_power_negotiation(slot, true);
1955 
1956 	ret = cqhci_suspend(slot->host->mmc);
1957 	if (ret)
1958 		goto err_suspend;
1959 
1960 	ret = sdhci_suspend_host(slot->host);
1961 	if (ret)
1962 		goto err_suspend_host;
1963 
1964 	return 0;
1965 
1966 err_suspend_host:
1967 	cqhci_resume(slot->host->mmc);
1968 err_suspend:
1969 	gl9763e_set_low_power_negotiation(slot, false);
1970 	return ret;
1971 }
1972 #endif
1973 
gli_probe_slot_gl9763e(struct sdhci_pci_slot * slot)1974 static int gli_probe_slot_gl9763e(struct sdhci_pci_slot *slot)
1975 {
1976 	struct pci_dev *pdev = slot->chip->pdev;
1977 	struct sdhci_host *host = slot->host;
1978 	u32 value;
1979 
1980 	host->mmc->caps |= MMC_CAP_8_BIT_DATA |
1981 			   MMC_CAP_1_8V_DDR |
1982 			   MMC_CAP_NONREMOVABLE;
1983 	host->mmc->caps2 |= MMC_CAP2_HS200_1_8V_SDR |
1984 			    MMC_CAP2_HS400_1_8V |
1985 			    MMC_CAP2_HS400_ES |
1986 			    MMC_CAP2_NO_SDIO |
1987 			    MMC_CAP2_NO_SD;
1988 
1989 	pci_read_config_dword(pdev, PCIE_GLI_9763E_MB, &value);
1990 	if (!(value & GLI_9763E_MB_CMDQ_OFF))
1991 		if (value & GLI_9763E_MB_ERP_ON)
1992 			host->mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD;
1993 
1994 	gli_pcie_enable_msi(slot);
1995 	host->mmc_host_ops.hs400_enhanced_strobe =
1996 					gl9763e_hs400_enhanced_strobe;
1997 	gl9763e_hw_setting(slot);
1998 	sdhci_enable_v4_mode(host);
1999 
2000 	return 0;
2001 }
2002 
2003 #define REG_OFFSET_IN_BITS(reg) ((reg) << 3 & 0x18)
2004 
sdhci_gli_readw(struct sdhci_host * host,int reg)2005 static u16 sdhci_gli_readw(struct sdhci_host *host, int reg)
2006 {
2007 	u32 val = readl(host->ioaddr + (reg & ~3));
2008 	u16 word;
2009 
2010 	word = (val >> REG_OFFSET_IN_BITS(reg)) & 0xffff;
2011 	return word;
2012 }
2013 
sdhci_gli_readb(struct sdhci_host * host,int reg)2014 static u8 sdhci_gli_readb(struct sdhci_host *host, int reg)
2015 {
2016 	u32 val = readl(host->ioaddr + (reg & ~3));
2017 	u8 byte = (val >> REG_OFFSET_IN_BITS(reg)) & 0xff;
2018 
2019 	return byte;
2020 }
2021 
2022 static const struct sdhci_ops sdhci_gl9755_ops = {
2023 	.read_w			= sdhci_gli_readw,
2024 	.read_b			= sdhci_gli_readb,
2025 	.set_clock		= sdhci_gl9755_set_clock,
2026 	.set_power		= gl9755_set_power,
2027 	.enable_dma		= sdhci_pci_enable_dma,
2028 	.set_bus_width		= sdhci_set_bus_width,
2029 	.reset			= sdhci_gl9755_reset,
2030 	.set_uhs_signaling	= sdhci_set_uhs_signaling,
2031 	.voltage_switch		= sdhci_gli_voltage_switch,
2032 	.dump_uhs2_regs		= sdhci_uhs2_dump_regs,
2033 	.set_timeout		= sdhci_uhs2_set_timeout,
2034 	.irq			= sdhci_uhs2_irq,
2035 	.uhs2_pre_detect_init   = sdhci_gli_pre_detect_init,
2036 };
2037 
2038 const struct sdhci_pci_fixes sdhci_gl9755 = {
2039 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
2040 	.quirks2	= SDHCI_QUIRK2_BROKEN_DDR50,
2041 	.probe_slot	= gli_probe_slot_gl9755,
2042 	.add_host	= sdhci_pci_uhs2_add_host,
2043 	.remove_host	= sdhci_pci_uhs2_remove_host,
2044 	.ops            = &sdhci_gl9755_ops,
2045 #ifdef CONFIG_PM_SLEEP
2046 	.resume         = sdhci_pci_gli_resume,
2047 #endif
2048 };
2049 
2050 static const struct sdhci_ops sdhci_gl9750_ops = {
2051 	.read_w			= sdhci_gli_readw,
2052 	.read_b			= sdhci_gli_readb,
2053 	.read_l                 = sdhci_gl9750_readl,
2054 	.set_clock		= sdhci_gl9750_set_clock,
2055 	.enable_dma		= sdhci_pci_enable_dma,
2056 	.set_bus_width		= sdhci_set_bus_width,
2057 	.reset			= sdhci_gl9750_reset,
2058 	.set_uhs_signaling	= sdhci_set_uhs_signaling,
2059 	.voltage_switch		= sdhci_gli_voltage_switch,
2060 	.platform_execute_tuning = gl9750_execute_tuning,
2061 };
2062 
2063 const struct sdhci_pci_fixes sdhci_gl9750 = {
2064 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
2065 	.quirks2	= SDHCI_QUIRK2_BROKEN_DDR50,
2066 	.probe_slot	= gli_probe_slot_gl9750,
2067 	.ops            = &sdhci_gl9750_ops,
2068 #ifdef CONFIG_PM_SLEEP
2069 	.resume         = sdhci_pci_gli_resume,
2070 #endif
2071 };
2072 
2073 static const struct sdhci_ops sdhci_gl9763e_ops = {
2074 	.set_clock		= sdhci_set_clock,
2075 	.enable_dma		= sdhci_pci_enable_dma,
2076 	.set_bus_width		= sdhci_set_bus_width,
2077 	.reset			= sdhci_and_cqhci_reset,
2078 	.set_uhs_signaling	= sdhci_set_gl9763e_signaling,
2079 	.voltage_switch		= sdhci_gli_voltage_switch,
2080 	.irq                    = sdhci_gl9763e_cqhci_irq,
2081 };
2082 
2083 const struct sdhci_pci_fixes sdhci_gl9763e = {
2084 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
2085 	.probe_slot	= gli_probe_slot_gl9763e,
2086 	.ops            = &sdhci_gl9763e_ops,
2087 #ifdef CONFIG_PM_SLEEP
2088 	.resume		= gl9763e_resume,
2089 	.suspend	= gl9763e_suspend,
2090 #endif
2091 #ifdef CONFIG_PM
2092 	.runtime_suspend = gl9763e_runtime_suspend,
2093 	.runtime_resume  = gl9763e_runtime_resume,
2094 	.allow_runtime_pm = true,
2095 #endif
2096 	.add_host       = gl9763e_add_host,
2097 };
2098 
2099 static const struct sdhci_ops sdhci_gl9767_ops = {
2100 	.set_clock		 = sdhci_gl9767_set_clock,
2101 	.enable_dma		 = sdhci_pci_enable_dma,
2102 	.set_bus_width		 = sdhci_set_bus_width,
2103 	.reset			 = sdhci_gl9767_reset,
2104 	.set_uhs_signaling	 = sdhci_set_uhs_signaling,
2105 	.voltage_switch		 = sdhci_gl9767_voltage_switch,
2106 	.dump_uhs2_regs		 = sdhci_uhs2_dump_regs,
2107 	.set_timeout		 = sdhci_uhs2_set_timeout,
2108 	.irq			 = sdhci_uhs2_irq,
2109 	.set_power		 = sdhci_gl9767_set_power,
2110 	.uhs2_pre_detect_init	 = sdhci_gli_pre_detect_init,
2111 	.card_event		 = sdhci_gl9767_card_event,
2112 };
2113 
2114 const struct sdhci_pci_fixes sdhci_gl9767 = {
2115 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
2116 	.quirks2	= SDHCI_QUIRK2_BROKEN_DDR50,
2117 	.probe_slot	= gli_probe_slot_gl9767,
2118 	.add_host	= sdhci_pci_uhs2_add_host,
2119 	.remove_host	= sdhci_pci_uhs2_remove_host,
2120 	.ops		= &sdhci_gl9767_ops,
2121 #ifdef CONFIG_PM_SLEEP
2122 	.resume		= sdhci_pci_gli_resume,
2123 #endif
2124 };
2125