1 // SPDX-License-Identifier: GPL-2.0 2 // PCI1xxxx SPI driver 3 // Copyright (C) 2022 Microchip Technology Inc. 4 // Authors: Tharun Kumar P <tharunkumar.pasumarthi@microchip.com> 5 // Kumaravel Thiagarajan <Kumaravel.Thiagarajan@microchip.com> 6 7 8 #include <linux/bitfield.h> 9 #include <linux/delay.h> 10 #include <linux/dma-mapping.h> 11 #include <linux/iopoll.h> 12 #include <linux/irq.h> 13 #include <linux/module.h> 14 #include <linux/msi.h> 15 #include <linux/pci_regs.h> 16 #include <linux/pci.h> 17 #include <linux/spinlock.h> 18 #include <linux/spi/spi.h> 19 #include "internals.h" 20 21 #define DRV_NAME "spi-pci1xxxx" 22 23 #define SYS_FREQ_DEFAULT (62500000) 24 25 #define PCI1XXXX_SPI_MAX_CLOCK_HZ (30000000) 26 #define PCI1XXXX_SPI_CLK_20MHZ (20000000) 27 #define PCI1XXXX_SPI_CLK_15MHZ (15000000) 28 #define PCI1XXXX_SPI_CLK_12MHZ (12000000) 29 #define PCI1XXXX_SPI_CLK_10MHZ (10000000) 30 #define PCI1XXXX_SPI_MIN_CLOCK_HZ (2000000) 31 32 #define PCI1XXXX_SPI_BUFFER_SIZE (320) 33 34 #define SPI_MST_CTL_DEVSEL_MASK (GENMASK(27, 25)) 35 #define SPI_MST_CTL_CMD_LEN_MASK (GENMASK(16, 8)) 36 #define SPI_MST_CTL_SPEED_MASK (GENMASK(7, 5)) 37 #define SPI_MSI_VECTOR_SEL_MASK (GENMASK(4, 4)) 38 39 #define SPI_MST_CTL_FORCE_CE (BIT(4)) 40 #define SPI_MST_CTL_MODE_SEL (BIT(2)) 41 #define SPI_MST_CTL_GO (BIT(0)) 42 43 #define SPI_PERI_ADDR_BASE (0x160000) 44 #define SPI_SYSTEM_ADDR_BASE (0x2000) 45 #define SPI_MST1_ADDR_BASE (0x800) 46 47 #define DEV_REV_REG (SPI_SYSTEM_ADDR_BASE + 0x00) 48 #define SPI_SYSLOCK_REG (SPI_SYSTEM_ADDR_BASE + 0xA0) 49 #define SPI_CONFIG_PERI_ENABLE_REG (SPI_SYSTEM_ADDR_BASE + 0x108) 50 51 #define SPI_PERI_ENBLE_PF_MASK (GENMASK(17, 16)) 52 #define DEV_REV_MASK (GENMASK(7, 0)) 53 54 #define SPI_SYSLOCK BIT(4) 55 #define SPI0 (0) 56 #define SPI1 (1) 57 58 /* DMA Related Registers */ 59 #define SPI_DMA_ADDR_BASE (0x1000) 60 #define SPI_DMA_GLOBAL_WR_ENGINE_EN (SPI_DMA_ADDR_BASE + 0x0C) 61 #define SPI_DMA_WR_DOORBELL_REG (SPI_DMA_ADDR_BASE + 0x10) 62 #define SPI_DMA_GLOBAL_RD_ENGINE_EN (SPI_DMA_ADDR_BASE + 0x2C) 63 #define SPI_DMA_RD_DOORBELL_REG (SPI_DMA_ADDR_BASE + 0x30) 64 #define SPI_DMA_INTR_WR_STS (SPI_DMA_ADDR_BASE + 0x4C) 65 #define SPI_DMA_WR_INT_MASK (SPI_DMA_ADDR_BASE + 0x54) 66 #define SPI_DMA_INTR_WR_CLR (SPI_DMA_ADDR_BASE + 0x58) 67 #define SPI_DMA_ERR_WR_STS (SPI_DMA_ADDR_BASE + 0x5C) 68 #define SPI_DMA_INTR_IMWR_WDONE_LOW (SPI_DMA_ADDR_BASE + 0x60) 69 #define SPI_DMA_INTR_IMWR_WDONE_HIGH (SPI_DMA_ADDR_BASE + 0x64) 70 #define SPI_DMA_INTR_IMWR_WABORT_LOW (SPI_DMA_ADDR_BASE + 0x68) 71 #define SPI_DMA_INTR_IMWR_WABORT_HIGH (SPI_DMA_ADDR_BASE + 0x6C) 72 #define SPI_DMA_INTR_WR_IMWR_DATA (SPI_DMA_ADDR_BASE + 0x70) 73 #define SPI_DMA_INTR_RD_STS (SPI_DMA_ADDR_BASE + 0xA0) 74 #define SPI_DMA_RD_INT_MASK (SPI_DMA_ADDR_BASE + 0xA8) 75 #define SPI_DMA_INTR_RD_CLR (SPI_DMA_ADDR_BASE + 0xAC) 76 #define SPI_DMA_ERR_RD_STS (SPI_DMA_ADDR_BASE + 0xB8) 77 #define SPI_DMA_INTR_IMWR_RDONE_LOW (SPI_DMA_ADDR_BASE + 0xCC) 78 #define SPI_DMA_INTR_IMWR_RDONE_HIGH (SPI_DMA_ADDR_BASE + 0xD0) 79 #define SPI_DMA_INTR_IMWR_RABORT_LOW (SPI_DMA_ADDR_BASE + 0xD4) 80 #define SPI_DMA_INTR_IMWR_RABORT_HIGH (SPI_DMA_ADDR_BASE + 0xD8) 81 #define SPI_DMA_INTR_RD_IMWR_DATA (SPI_DMA_ADDR_BASE + 0xDC) 82 83 #define SPI_DMA_CH0_WR_BASE (SPI_DMA_ADDR_BASE + 0x200) 84 #define SPI_DMA_CH0_RD_BASE (SPI_DMA_ADDR_BASE + 0x300) 85 #define SPI_DMA_CH1_WR_BASE (SPI_DMA_ADDR_BASE + 0x400) 86 #define SPI_DMA_CH1_RD_BASE (SPI_DMA_ADDR_BASE + 0x500) 87 88 #define SPI_DMA_CH_CTL1_OFFSET (0x00) 89 #define SPI_DMA_CH_XFER_LEN_OFFSET (0x08) 90 #define SPI_DMA_CH_SAR_LO_OFFSET (0x0C) 91 #define SPI_DMA_CH_SAR_HI_OFFSET (0x10) 92 #define SPI_DMA_CH_DAR_LO_OFFSET (0x14) 93 #define SPI_DMA_CH_DAR_HI_OFFSET (0x18) 94 95 #define SPI_DMA_CH0_DONE_INT BIT(0) 96 #define SPI_DMA_CH1_DONE_INT BIT(1) 97 #define SPI_DMA_CH0_ABORT_INT BIT(16) 98 #define SPI_DMA_CH1_ABORT_INT BIT(17) 99 #define SPI_DMA_DONE_INT_MASK (SPI_DMA_CH0_DONE_INT | SPI_DMA_CH1_DONE_INT) 100 #define SPI_DMA_ABORT_INT_MASK (SPI_DMA_CH0_ABORT_INT | SPI_DMA_CH1_ABORT_INT) 101 #define DMA_CH_CONTROL_LIE BIT(3) 102 #define DMA_CH_CONTROL_RIE BIT(4) 103 #define DMA_INTR_EN (DMA_CH_CONTROL_RIE | DMA_CH_CONTROL_LIE) 104 105 /* x refers to SPI Host Controller HW instance id in the below macros - 0 or 1 */ 106 107 #define SPI_MST_CMD_BUF_OFFSET(x) (((x) * SPI_MST1_ADDR_BASE) + 0x00) 108 #define SPI_MST_RSP_BUF_OFFSET(x) (((x) * SPI_MST1_ADDR_BASE) + 0x200) 109 #define SPI_MST_CTL_REG_OFFSET(x) (((x) * SPI_MST1_ADDR_BASE) + 0x400) 110 #define SPI_MST_EVENT_REG_OFFSET(x) (((x) * SPI_MST1_ADDR_BASE) + 0x420) 111 #define SPI_MST_EVENT_MASK_REG_OFFSET(x) (((x) * SPI_MST1_ADDR_BASE) + 0x424) 112 #define SPI_MST_PAD_CTL_REG_OFFSET(x) (((x) * SPI_MST1_ADDR_BASE) + 0x460) 113 #define SPIALERT_MST_DB_REG_OFFSET(x) (((x) * SPI_MST1_ADDR_BASE) + 0x464) 114 #define SPIALERT_MST_VAL_REG_OFFSET(x) (((x) * SPI_MST1_ADDR_BASE) + 0x468) 115 #define SPI_PCI_CTRL_REG_OFFSET(x) (((x) * SPI_MST1_ADDR_BASE) + 0x480) 116 117 #define PCI1XXXX_IRQ_FLAGS (IRQF_NO_SUSPEND | IRQF_TRIGGER_NONE) 118 #define SPI_MAX_DATA_LEN 320 119 120 #define PCI1XXXX_SPI_TIMEOUT (msecs_to_jiffies(100)) 121 #define SYSLOCK_RETRY_CNT (1000) 122 #define SPI_DMA_ENGINE_EN (0x1) 123 #define SPI_DMA_ENGINE_DIS (0x0) 124 125 #define SPI_INTR BIT(8) 126 #define SPI_FORCE_CE BIT(4) 127 128 #define SPI_CHIP_SEL_COUNT 7 129 #define VENDOR_ID_MCHP 0x1055 130 131 #define SPI_SUSPEND_CONFIG 0x101 132 #define SPI_RESUME_CONFIG 0x203 133 134 struct pci1xxxx_spi_internal { 135 u8 hw_inst; 136 u8 clkdiv; 137 int irq; 138 int mode; 139 bool spi_xfer_in_progress; 140 void *rx_buf; 141 bool dma_aborted_rd; 142 u32 bytes_recvd; 143 u32 tx_sgl_len; 144 u32 rx_sgl_len; 145 struct scatterlist *tx_sgl, *rx_sgl; 146 bool dma_aborted_wr; 147 struct completion spi_xfer_done; 148 struct spi_controller *spi_host; 149 struct pci1xxxx_spi *parent; 150 struct spi_transfer *xfer; 151 struct { 152 unsigned int dev_sel : 3; 153 unsigned int msi_vector_sel : 1; 154 } prev_val; 155 }; 156 157 struct pci1xxxx_spi { 158 struct pci_dev *dev; 159 u8 total_hw_instances; 160 u8 dev_rev; 161 void __iomem *reg_base; 162 void __iomem *dma_offset_bar; 163 /* lock to safely access the DMA registers in isr */ 164 spinlock_t dma_reg_lock; 165 bool can_dma; 166 struct pci1xxxx_spi_internal *spi_int[] __counted_by(total_hw_instances); 167 }; 168 169 static const struct pci_device_id pci1xxxx_spi_pci_id_table[] = { 170 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa004, PCI_ANY_ID, 0x0001), 0, 0, 0x02}, 171 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa004, PCI_ANY_ID, 0x0002), 0, 0, 0x01}, 172 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa004, PCI_ANY_ID, 0x0003), 0, 0, 0x11}, 173 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa004, PCI_ANY_ID, PCI_ANY_ID), 0, 0, 0x01}, 174 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa014, PCI_ANY_ID, 0x0001), 0, 0, 0x02}, 175 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa014, PCI_ANY_ID, 0x0002), 0, 0, 0x01}, 176 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa014, PCI_ANY_ID, 0x0003), 0, 0, 0x11}, 177 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa014, PCI_ANY_ID, PCI_ANY_ID), 0, 0, 0x01}, 178 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa024, PCI_ANY_ID, 0x0001), 0, 0, 0x02}, 179 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa024, PCI_ANY_ID, 0x0002), 0, 0, 0x01}, 180 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa024, PCI_ANY_ID, 0x0003), 0, 0, 0x11}, 181 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa024, PCI_ANY_ID, PCI_ANY_ID), 0, 0, 0x01}, 182 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa034, PCI_ANY_ID, 0x0001), 0, 0, 0x02}, 183 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa034, PCI_ANY_ID, 0x0002), 0, 0, 0x01}, 184 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa034, PCI_ANY_ID, 0x0003), 0, 0, 0x11}, 185 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa034, PCI_ANY_ID, PCI_ANY_ID), 0, 0, 0x01}, 186 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa044, PCI_ANY_ID, 0x0001), 0, 0, 0x02}, 187 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa044, PCI_ANY_ID, 0x0002), 0, 0, 0x01}, 188 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa044, PCI_ANY_ID, 0x0003), 0, 0, 0x11}, 189 { PCI_DEVICE_SUB(VENDOR_ID_MCHP, 0xa044, PCI_ANY_ID, PCI_ANY_ID), 0, 0, 0x01}, 190 { 0, } 191 }; 192 193 MODULE_DEVICE_TABLE(pci, pci1xxxx_spi_pci_id_table); 194 195 static int pci1xxxx_set_sys_lock(struct pci1xxxx_spi *par) 196 { 197 writel(SPI_SYSLOCK, par->reg_base + SPI_SYSLOCK_REG); 198 return readl(par->reg_base + SPI_SYSLOCK_REG); 199 } 200 201 static int pci1xxxx_acquire_sys_lock(struct pci1xxxx_spi *par) 202 { 203 u32 regval; 204 205 return readx_poll_timeout(pci1xxxx_set_sys_lock, par, regval, 206 (regval & SPI_SYSLOCK), 100, 207 SYSLOCK_RETRY_CNT * 100); 208 } 209 210 static void pci1xxxx_release_sys_lock(struct pci1xxxx_spi *par) 211 { 212 writel(0x0, par->reg_base + SPI_SYSLOCK_REG); 213 } 214 215 static int pci1xxxx_check_spi_can_dma(struct pci1xxxx_spi *spi_bus, int irq) 216 { 217 struct pci_dev *pdev = spi_bus->dev; 218 u32 pf_num; 219 u32 regval; 220 int ret; 221 222 /* 223 * DEV REV Registers is a system register, HW Syslock bit 224 * should be acquired before accessing the register 225 */ 226 ret = pci1xxxx_acquire_sys_lock(spi_bus); 227 if (ret) { 228 dev_err(&pdev->dev, "Error failed to acquire syslock\n"); 229 return ret; 230 } 231 232 regval = readl(spi_bus->reg_base + DEV_REV_REG); 233 spi_bus->dev_rev = regval & DEV_REV_MASK; 234 if (spi_bus->dev_rev >= 0xC0) { 235 regval = readl(spi_bus->reg_base + 236 SPI_CONFIG_PERI_ENABLE_REG); 237 pf_num = regval & SPI_PERI_ENBLE_PF_MASK; 238 } 239 240 pci1xxxx_release_sys_lock(spi_bus); 241 242 /* 243 * DMA is supported only from C0 and SPI can use DMA only if 244 * it is mapped to PF0 245 */ 246 if (spi_bus->dev_rev < 0xC0 || pf_num) 247 return -EOPNOTSUPP; 248 249 /* 250 * DMA Supported only with MSI Interrupts 251 * One of the SPI instance's MSI vector address and data 252 * is used for DMA Interrupt 253 */ 254 if (!irq_get_msi_desc(irq)) { 255 dev_warn(&pdev->dev, "Error MSI Interrupt not supported, will operate in PIO mode\n"); 256 return -EOPNOTSUPP; 257 } 258 259 spi_bus->dma_offset_bar = pcim_iomap(pdev, 2, pci_resource_len(pdev, 2)); 260 if (!spi_bus->dma_offset_bar) { 261 dev_warn(&pdev->dev, "Error failed to map dma bar, will operate in PIO mode\n"); 262 return -EOPNOTSUPP; 263 } 264 265 if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) { 266 dev_warn(&pdev->dev, "Error failed to set DMA mask, will operate in PIO mode\n"); 267 pcim_iounmap(pdev, spi_bus->dma_offset_bar); 268 spi_bus->dma_offset_bar = NULL; 269 return -EOPNOTSUPP; 270 } 271 272 return 0; 273 } 274 275 static int pci1xxxx_spi_dma_init(struct pci1xxxx_spi *spi_bus, int irq) 276 { 277 struct msi_msg msi; 278 int ret; 279 280 ret = pci1xxxx_check_spi_can_dma(spi_bus, irq); 281 if (ret) 282 return ret; 283 284 spin_lock_init(&spi_bus->dma_reg_lock); 285 get_cached_msi_msg(irq, &msi); 286 writel(SPI_DMA_ENGINE_EN, spi_bus->dma_offset_bar + SPI_DMA_GLOBAL_WR_ENGINE_EN); 287 writel(SPI_DMA_ENGINE_EN, spi_bus->dma_offset_bar + SPI_DMA_GLOBAL_RD_ENGINE_EN); 288 writel(msi.address_hi, spi_bus->dma_offset_bar + SPI_DMA_INTR_IMWR_WDONE_HIGH); 289 writel(msi.address_hi, spi_bus->dma_offset_bar + SPI_DMA_INTR_IMWR_WABORT_HIGH); 290 writel(msi.address_hi, spi_bus->dma_offset_bar + SPI_DMA_INTR_IMWR_RDONE_HIGH); 291 writel(msi.address_hi, spi_bus->dma_offset_bar + SPI_DMA_INTR_IMWR_RABORT_HIGH); 292 writel(msi.address_lo, spi_bus->dma_offset_bar + SPI_DMA_INTR_IMWR_WDONE_LOW); 293 writel(msi.address_lo, spi_bus->dma_offset_bar + SPI_DMA_INTR_IMWR_WABORT_LOW); 294 writel(msi.address_lo, spi_bus->dma_offset_bar + SPI_DMA_INTR_IMWR_RDONE_LOW); 295 writel(msi.address_lo, spi_bus->dma_offset_bar + SPI_DMA_INTR_IMWR_RABORT_LOW); 296 writel(msi.data, spi_bus->dma_offset_bar + SPI_DMA_INTR_WR_IMWR_DATA); 297 writel(msi.data, spi_bus->dma_offset_bar + SPI_DMA_INTR_RD_IMWR_DATA); 298 dma_set_max_seg_size(&spi_bus->dev->dev, PCI1XXXX_SPI_BUFFER_SIZE); 299 spi_bus->can_dma = true; 300 return 0; 301 } 302 303 static void pci1xxxx_spi_set_cs(struct spi_device *spi, bool enable) 304 { 305 struct pci1xxxx_spi_internal *p = spi_controller_get_devdata(spi->controller); 306 struct pci1xxxx_spi *par = p->parent; 307 u32 regval; 308 309 /* Set the DEV_SEL bits of the SPI_MST_CTL_REG */ 310 regval = readl(par->reg_base + SPI_MST_CTL_REG_OFFSET(p->hw_inst)); 311 if (!enable) { 312 regval |= SPI_FORCE_CE; 313 regval &= ~SPI_MST_CTL_DEVSEL_MASK; 314 regval |= (spi_get_chipselect(spi, 0) << 25); 315 } else { 316 regval &= ~SPI_FORCE_CE; 317 } 318 writel(regval, par->reg_base + SPI_MST_CTL_REG_OFFSET(p->hw_inst)); 319 } 320 321 static u8 pci1xxxx_get_clock_div(u32 hz) 322 { 323 u8 val = 0; 324 325 if (hz >= PCI1XXXX_SPI_MAX_CLOCK_HZ) 326 val = 2; 327 else if ((hz < PCI1XXXX_SPI_MAX_CLOCK_HZ) && (hz >= PCI1XXXX_SPI_CLK_20MHZ)) 328 val = 3; 329 else if ((hz < PCI1XXXX_SPI_CLK_20MHZ) && (hz >= PCI1XXXX_SPI_CLK_15MHZ)) 330 val = 4; 331 else if ((hz < PCI1XXXX_SPI_CLK_15MHZ) && (hz >= PCI1XXXX_SPI_CLK_12MHZ)) 332 val = 5; 333 else if ((hz < PCI1XXXX_SPI_CLK_12MHZ) && (hz >= PCI1XXXX_SPI_CLK_10MHZ)) 334 val = 6; 335 else if ((hz < PCI1XXXX_SPI_CLK_10MHZ) && (hz >= PCI1XXXX_SPI_MIN_CLOCK_HZ)) 336 val = 7; 337 else 338 val = 2; 339 340 return val; 341 } 342 343 static void pci1xxxx_spi_setup_dma_to_io(struct pci1xxxx_spi_internal *p, 344 dma_addr_t dma_addr, u32 len) 345 { 346 void __iomem *base; 347 348 if (!p->hw_inst) 349 base = p->parent->dma_offset_bar + SPI_DMA_CH0_RD_BASE; 350 else 351 base = p->parent->dma_offset_bar + SPI_DMA_CH1_RD_BASE; 352 353 writel(DMA_INTR_EN, base + SPI_DMA_CH_CTL1_OFFSET); 354 writel(len, base + SPI_DMA_CH_XFER_LEN_OFFSET); 355 writel(lower_32_bits(dma_addr), base + SPI_DMA_CH_SAR_LO_OFFSET); 356 writel(upper_32_bits(dma_addr), base + SPI_DMA_CH_SAR_HI_OFFSET); 357 /* Updated SPI Command Registers */ 358 writel(lower_32_bits(SPI_PERI_ADDR_BASE + SPI_MST_CMD_BUF_OFFSET(p->hw_inst)), 359 base + SPI_DMA_CH_DAR_LO_OFFSET); 360 writel(upper_32_bits(SPI_PERI_ADDR_BASE + SPI_MST_CMD_BUF_OFFSET(p->hw_inst)), 361 base + SPI_DMA_CH_DAR_HI_OFFSET); 362 } 363 364 static void pci1xxxx_spi_setup_dma_from_io(struct pci1xxxx_spi_internal *p, 365 dma_addr_t dma_addr, u32 len) 366 { 367 void *base; 368 369 if (!p->hw_inst) 370 base = p->parent->dma_offset_bar + SPI_DMA_CH0_WR_BASE; 371 else 372 base = p->parent->dma_offset_bar + SPI_DMA_CH1_WR_BASE; 373 374 writel(DMA_INTR_EN, base + SPI_DMA_CH_CTL1_OFFSET); 375 writel(len, base + SPI_DMA_CH_XFER_LEN_OFFSET); 376 writel(lower_32_bits(dma_addr), base + SPI_DMA_CH_DAR_LO_OFFSET); 377 writel(upper_32_bits(dma_addr), base + SPI_DMA_CH_DAR_HI_OFFSET); 378 writel(lower_32_bits(SPI_PERI_ADDR_BASE + SPI_MST_RSP_BUF_OFFSET(p->hw_inst)), 379 base + SPI_DMA_CH_SAR_LO_OFFSET); 380 writel(upper_32_bits(SPI_PERI_ADDR_BASE + SPI_MST_RSP_BUF_OFFSET(p->hw_inst)), 381 base + SPI_DMA_CH_SAR_HI_OFFSET); 382 } 383 384 static void pci1xxxx_spi_setup(struct pci1xxxx_spi *par, u8 hw_inst, u32 mode, 385 u8 clkdiv, u32 len) 386 { 387 u32 regval; 388 389 regval = readl(par->reg_base + SPI_MST_CTL_REG_OFFSET(hw_inst)); 390 regval &= ~(SPI_MST_CTL_MODE_SEL | SPI_MST_CTL_CMD_LEN_MASK | 391 SPI_MST_CTL_SPEED_MASK); 392 393 if (mode == SPI_MODE_3) 394 regval |= SPI_MST_CTL_MODE_SEL; 395 396 regval |= FIELD_PREP(SPI_MST_CTL_CMD_LEN_MASK, len); 397 regval |= FIELD_PREP(SPI_MST_CTL_SPEED_MASK, clkdiv); 398 writel(regval, par->reg_base + SPI_MST_CTL_REG_OFFSET(hw_inst)); 399 } 400 401 static void pci1xxxx_start_spi_xfer(struct pci1xxxx_spi_internal *p, u8 hw_inst) 402 { 403 u32 regval; 404 405 regval = readl(p->parent->reg_base + SPI_MST_CTL_REG_OFFSET(hw_inst)); 406 regval |= SPI_MST_CTL_GO; 407 writel(regval, p->parent->reg_base + SPI_MST_CTL_REG_OFFSET(hw_inst)); 408 } 409 410 static int pci1xxxx_spi_transfer_with_io(struct spi_controller *spi_ctlr, 411 struct spi_device *spi, struct spi_transfer *xfer) 412 { 413 struct pci1xxxx_spi_internal *p = spi_controller_get_devdata(spi_ctlr); 414 struct pci1xxxx_spi *par = p->parent; 415 int len, loop_iter, transfer_len; 416 unsigned long bytes_transfered; 417 unsigned long bytes_recvd; 418 unsigned long loop_count; 419 u8 *rx_buf, result; 420 const u8 *tx_buf; 421 u32 regval; 422 u8 clkdiv; 423 424 p->spi_xfer_in_progress = true; 425 p->bytes_recvd = 0; 426 clkdiv = pci1xxxx_get_clock_div(xfer->speed_hz); 427 tx_buf = xfer->tx_buf; 428 rx_buf = xfer->rx_buf; 429 transfer_len = xfer->len; 430 regval = readl(par->reg_base + SPI_MST_EVENT_REG_OFFSET(p->hw_inst)); 431 writel(regval, par->reg_base + SPI_MST_EVENT_REG_OFFSET(p->hw_inst)); 432 433 if (tx_buf) { 434 bytes_transfered = 0; 435 bytes_recvd = 0; 436 loop_count = transfer_len / SPI_MAX_DATA_LEN; 437 if (transfer_len % SPI_MAX_DATA_LEN != 0) 438 loop_count += 1; 439 440 for (loop_iter = 0; loop_iter < loop_count; loop_iter++) { 441 len = SPI_MAX_DATA_LEN; 442 if ((transfer_len % SPI_MAX_DATA_LEN != 0) && 443 (loop_iter == loop_count - 1)) 444 len = transfer_len % SPI_MAX_DATA_LEN; 445 446 reinit_completion(&p->spi_xfer_done); 447 memcpy_toio(par->reg_base + SPI_MST_CMD_BUF_OFFSET(p->hw_inst), 448 &tx_buf[bytes_transfered], len); 449 bytes_transfered += len; 450 pci1xxxx_spi_setup(par, p->hw_inst, spi->mode, clkdiv, len); 451 pci1xxxx_start_spi_xfer(p, p->hw_inst); 452 453 /* Wait for DMA_TERM interrupt */ 454 result = wait_for_completion_timeout(&p->spi_xfer_done, 455 PCI1XXXX_SPI_TIMEOUT); 456 if (!result) 457 return -ETIMEDOUT; 458 459 if (rx_buf) { 460 memcpy_fromio(&rx_buf[bytes_recvd], par->reg_base + 461 SPI_MST_RSP_BUF_OFFSET(p->hw_inst), len); 462 bytes_recvd += len; 463 } 464 } 465 } 466 p->spi_xfer_in_progress = false; 467 468 return 0; 469 } 470 471 static int pci1xxxx_spi_transfer_with_dma(struct spi_controller *spi_ctlr, 472 struct spi_device *spi, 473 struct spi_transfer *xfer) 474 { 475 struct pci1xxxx_spi_internal *p = spi_controller_get_devdata(spi_ctlr); 476 struct pci1xxxx_spi *par = p->parent; 477 dma_addr_t rx_dma_addr = 0; 478 dma_addr_t tx_dma_addr = 0; 479 int ret = 0; 480 u32 regval; 481 482 p->spi_xfer_in_progress = true; 483 p->tx_sgl = xfer->tx_sg.sgl; 484 p->rx_sgl = xfer->rx_sg.sgl; 485 p->rx_buf = xfer->rx_buf; 486 regval = readl(par->reg_base + SPI_MST_EVENT_REG_OFFSET(p->hw_inst)); 487 writel(regval, par->reg_base + SPI_MST_EVENT_REG_OFFSET(p->hw_inst)); 488 489 if (!xfer->tx_buf || !p->tx_sgl) { 490 ret = -EINVAL; 491 goto error; 492 } 493 p->xfer = xfer; 494 p->mode = spi->mode; 495 p->clkdiv = pci1xxxx_get_clock_div(xfer->speed_hz); 496 p->bytes_recvd = 0; 497 p->rx_buf = xfer->rx_buf; 498 regval = readl(par->reg_base + SPI_MST_EVENT_REG_OFFSET(p->hw_inst)); 499 writel(regval, par->reg_base + SPI_MST_EVENT_REG_OFFSET(p->hw_inst)); 500 501 tx_dma_addr = sg_dma_address(p->tx_sgl); 502 rx_dma_addr = sg_dma_address(p->rx_sgl); 503 p->tx_sgl_len = sg_dma_len(p->tx_sgl); 504 p->rx_sgl_len = sg_dma_len(p->rx_sgl); 505 pci1xxxx_spi_setup(par, p->hw_inst, p->mode, p->clkdiv, p->tx_sgl_len); 506 pci1xxxx_spi_setup_dma_to_io(p, (tx_dma_addr), p->tx_sgl_len); 507 if (rx_dma_addr) 508 pci1xxxx_spi_setup_dma_from_io(p, rx_dma_addr, p->rx_sgl_len); 509 writel(p->hw_inst, par->dma_offset_bar + SPI_DMA_RD_DOORBELL_REG); 510 511 reinit_completion(&p->spi_xfer_done); 512 /* Wait for DMA_TERM interrupt */ 513 ret = wait_for_completion_timeout(&p->spi_xfer_done, PCI1XXXX_SPI_TIMEOUT); 514 if (!ret) { 515 ret = -ETIMEDOUT; 516 if (p->dma_aborted_rd) { 517 writel(SPI_DMA_ENGINE_DIS, 518 par->dma_offset_bar + SPI_DMA_GLOBAL_RD_ENGINE_EN); 519 /* 520 * DMA ENGINE reset takes time if any TLP 521 * completeion in progress, should wait 522 * till DMA Engine reset is completed. 523 */ 524 ret = readl_poll_timeout(par->dma_offset_bar + 525 SPI_DMA_GLOBAL_RD_ENGINE_EN, regval, 526 (regval == 0x0), 0, USEC_PER_MSEC); 527 if (ret) { 528 ret = -ECANCELED; 529 goto error; 530 } 531 writel(SPI_DMA_ENGINE_EN, 532 par->dma_offset_bar + SPI_DMA_GLOBAL_RD_ENGINE_EN); 533 p->dma_aborted_rd = false; 534 ret = -ECANCELED; 535 } 536 if (p->dma_aborted_wr) { 537 writel(SPI_DMA_ENGINE_DIS, 538 par->dma_offset_bar + SPI_DMA_GLOBAL_WR_ENGINE_EN); 539 540 /* 541 * DMA ENGINE reset takes time if any TLP 542 * completeion in progress, should wait 543 * till DMA Engine reset is completed. 544 */ 545 ret = readl_poll_timeout(par->dma_offset_bar + 546 SPI_DMA_GLOBAL_WR_ENGINE_EN, regval, 547 (regval == 0x0), 0, USEC_PER_MSEC); 548 if (ret) { 549 ret = -ECANCELED; 550 goto error; 551 } 552 553 writel(SPI_DMA_ENGINE_EN, 554 par->dma_offset_bar + SPI_DMA_GLOBAL_WR_ENGINE_EN); 555 p->dma_aborted_wr = false; 556 ret = -ECANCELED; 557 } 558 goto error; 559 } 560 ret = 0; 561 562 error: 563 p->spi_xfer_in_progress = false; 564 565 return ret; 566 } 567 568 static int pci1xxxx_spi_transfer_one(struct spi_controller *spi_ctlr, 569 struct spi_device *spi, struct spi_transfer *xfer) 570 { 571 if (spi_xfer_is_dma_mapped(spi_ctlr, spi, xfer)) 572 return pci1xxxx_spi_transfer_with_dma(spi_ctlr, spi, xfer); 573 else 574 return pci1xxxx_spi_transfer_with_io(spi_ctlr, spi, xfer); 575 } 576 577 static irqreturn_t pci1xxxx_spi_isr_io(int irq, void *dev) 578 { 579 struct pci1xxxx_spi_internal *p = dev; 580 irqreturn_t spi_int_fired = IRQ_NONE; 581 u32 regval; 582 583 /* Clear the SPI GO_BIT Interrupt */ 584 regval = readl(p->parent->reg_base + SPI_MST_EVENT_REG_OFFSET(p->hw_inst)); 585 if (regval & SPI_INTR) { 586 /* Clear xfer_done */ 587 if (p->parent->can_dma && p->rx_buf) 588 writel(p->hw_inst, p->parent->dma_offset_bar + 589 SPI_DMA_WR_DOORBELL_REG); 590 else 591 complete(&p->parent->spi_int[p->hw_inst]->spi_xfer_done); 592 spi_int_fired = IRQ_HANDLED; 593 } 594 writel(regval, p->parent->reg_base + SPI_MST_EVENT_REG_OFFSET(p->hw_inst)); 595 return spi_int_fired; 596 } 597 598 static void pci1xxxx_spi_setup_next_dma_transfer(struct pci1xxxx_spi_internal *p) 599 { 600 dma_addr_t tx_dma_addr = 0; 601 dma_addr_t rx_dma_addr = 0; 602 u32 prev_len; 603 604 p->tx_sgl = sg_next(p->tx_sgl); 605 if (p->rx_sgl) 606 p->rx_sgl = sg_next(p->rx_sgl); 607 if (!p->tx_sgl) { 608 /* Clear xfer_done */ 609 complete(&p->spi_xfer_done); 610 } else { 611 tx_dma_addr = sg_dma_address(p->tx_sgl); 612 prev_len = p->tx_sgl_len; 613 p->tx_sgl_len = sg_dma_len(p->tx_sgl); 614 if (prev_len != p->tx_sgl_len) 615 pci1xxxx_spi_setup(p->parent, 616 p->hw_inst, p->mode, p->clkdiv, p->tx_sgl_len); 617 pci1xxxx_spi_setup_dma_to_io(p, tx_dma_addr, p->tx_sgl_len); 618 if (p->rx_sgl) { 619 rx_dma_addr = sg_dma_address(p->rx_sgl); 620 p->rx_sgl_len = sg_dma_len(p->rx_sgl); 621 pci1xxxx_spi_setup_dma_from_io(p, rx_dma_addr, p->rx_sgl_len); 622 } 623 writel(p->hw_inst, p->parent->dma_offset_bar + SPI_DMA_RD_DOORBELL_REG); 624 } 625 } 626 627 static irqreturn_t pci1xxxx_spi_isr_dma(int irq, void *dev) 628 { 629 struct pci1xxxx_spi_internal *p = dev; 630 irqreturn_t spi_int_fired = IRQ_NONE; 631 unsigned long flags; 632 u32 regval; 633 634 spin_lock_irqsave(&p->parent->dma_reg_lock, flags); 635 /* Clear the DMA RD INT and start spi xfer*/ 636 regval = readl(p->parent->dma_offset_bar + SPI_DMA_INTR_RD_STS); 637 if (regval & SPI_DMA_DONE_INT_MASK) { 638 if (regval & SPI_DMA_CH0_DONE_INT) 639 pci1xxxx_start_spi_xfer(p, SPI0); 640 if (regval & SPI_DMA_CH1_DONE_INT) 641 pci1xxxx_start_spi_xfer(p, SPI1); 642 spi_int_fired = IRQ_HANDLED; 643 } 644 if (regval & SPI_DMA_ABORT_INT_MASK) { 645 p->dma_aborted_rd = true; 646 spi_int_fired = IRQ_HANDLED; 647 } 648 writel(regval, p->parent->dma_offset_bar + SPI_DMA_INTR_RD_CLR); 649 650 /* Clear the DMA WR INT */ 651 regval = readl(p->parent->dma_offset_bar + SPI_DMA_INTR_WR_STS); 652 if (regval & SPI_DMA_DONE_INT_MASK) { 653 if (regval & SPI_DMA_CH0_DONE_INT) 654 pci1xxxx_spi_setup_next_dma_transfer(p->parent->spi_int[SPI0]); 655 656 if (regval & SPI_DMA_CH1_DONE_INT) 657 pci1xxxx_spi_setup_next_dma_transfer(p->parent->spi_int[SPI1]); 658 659 spi_int_fired = IRQ_HANDLED; 660 } 661 if (regval & SPI_DMA_ABORT_INT_MASK) { 662 p->dma_aborted_wr = true; 663 spi_int_fired = IRQ_HANDLED; 664 } 665 writel(regval, p->parent->dma_offset_bar + SPI_DMA_INTR_WR_CLR); 666 spin_unlock_irqrestore(&p->parent->dma_reg_lock, flags); 667 668 /* Clear the SPI GO_BIT Interrupt */ 669 regval = readl(p->parent->reg_base + SPI_MST_EVENT_REG_OFFSET(p->hw_inst)); 670 if (regval & SPI_INTR) { 671 writel(p->hw_inst, p->parent->dma_offset_bar + SPI_DMA_WR_DOORBELL_REG); 672 spi_int_fired = IRQ_HANDLED; 673 } 674 writel(regval, p->parent->reg_base + SPI_MST_EVENT_REG_OFFSET(p->hw_inst)); 675 return spi_int_fired; 676 } 677 678 static irqreturn_t pci1xxxx_spi_isr(int irq, void *dev) 679 { 680 struct pci1xxxx_spi_internal *p = dev; 681 682 if (p->spi_host->can_dma(p->spi_host, NULL, p->xfer)) 683 return pci1xxxx_spi_isr_dma(irq, dev); 684 else 685 return pci1xxxx_spi_isr_io(irq, dev); 686 } 687 688 static bool pci1xxxx_spi_can_dma(struct spi_controller *host, 689 struct spi_device *spi, 690 struct spi_transfer *xfer) 691 { 692 struct pci1xxxx_spi_internal *p = spi_controller_get_devdata(host); 693 struct pci1xxxx_spi *par = p->parent; 694 695 return par->can_dma; 696 } 697 698 static int pci1xxxx_spi_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 699 { 700 u8 hw_inst_cnt, iter, start, only_sec_inst; 701 struct pci1xxxx_spi_internal *spi_sub_ptr; 702 struct device *dev = &pdev->dev; 703 struct pci1xxxx_spi *spi_bus; 704 struct spi_controller *spi_host; 705 u32 regval; 706 int ret; 707 708 hw_inst_cnt = ent->driver_data & 0x0f; 709 start = (ent->driver_data & 0xf0) >> 4; 710 if (start == 1) 711 only_sec_inst = 1; 712 else 713 only_sec_inst = 0; 714 715 spi_bus = devm_kzalloc(&pdev->dev, 716 struct_size(spi_bus, spi_int, hw_inst_cnt), 717 GFP_KERNEL); 718 if (!spi_bus) 719 return -ENOMEM; 720 721 spi_bus->dev = pdev; 722 spi_bus->total_hw_instances = hw_inst_cnt; 723 pci_set_master(pdev); 724 725 for (iter = 0; iter < hw_inst_cnt; iter++) { 726 spi_bus->spi_int[iter] = devm_kzalloc(&pdev->dev, 727 sizeof(struct pci1xxxx_spi_internal), 728 GFP_KERNEL); 729 if (!spi_bus->spi_int[iter]) 730 return -ENOMEM; 731 spi_sub_ptr = spi_bus->spi_int[iter]; 732 spi_sub_ptr->spi_host = devm_spi_alloc_host(dev, sizeof(struct spi_controller)); 733 if (!spi_sub_ptr->spi_host) 734 return -ENOMEM; 735 736 spi_sub_ptr->parent = spi_bus; 737 spi_sub_ptr->spi_xfer_in_progress = false; 738 739 if (!iter) { 740 ret = pcim_enable_device(pdev); 741 if (ret) 742 return -ENOMEM; 743 744 ret = pci_request_regions(pdev, DRV_NAME); 745 if (ret) 746 return -ENOMEM; 747 748 spi_bus->reg_base = pcim_iomap(pdev, 0, pci_resource_len(pdev, 0)); 749 if (!spi_bus->reg_base) { 750 ret = -EINVAL; 751 goto error; 752 } 753 754 ret = pci_alloc_irq_vectors(pdev, hw_inst_cnt, hw_inst_cnt, 755 PCI_IRQ_ALL_TYPES); 756 if (ret < 0) { 757 dev_err(&pdev->dev, "Error allocating MSI vectors\n"); 758 goto error; 759 } 760 761 init_completion(&spi_sub_ptr->spi_xfer_done); 762 /* Initialize Interrupts - SPI_INT */ 763 regval = readl(spi_bus->reg_base + 764 SPI_MST_EVENT_MASK_REG_OFFSET(spi_sub_ptr->hw_inst)); 765 regval &= ~SPI_INTR; 766 writel(regval, spi_bus->reg_base + 767 SPI_MST_EVENT_MASK_REG_OFFSET(spi_sub_ptr->hw_inst)); 768 spi_sub_ptr->irq = pci_irq_vector(pdev, 0); 769 770 ret = devm_request_irq(&pdev->dev, spi_sub_ptr->irq, 771 pci1xxxx_spi_isr, PCI1XXXX_IRQ_FLAGS, 772 pci_name(pdev), spi_sub_ptr); 773 if (ret < 0) { 774 dev_err(&pdev->dev, "Unable to request irq : %d", 775 spi_sub_ptr->irq); 776 ret = -ENODEV; 777 goto error; 778 } 779 780 ret = pci1xxxx_spi_dma_init(spi_bus, spi_sub_ptr->irq); 781 if (ret && ret != -EOPNOTSUPP) 782 goto error; 783 784 /* This register is only applicable for 1st instance */ 785 regval = readl(spi_bus->reg_base + SPI_PCI_CTRL_REG_OFFSET(0)); 786 if (!only_sec_inst) 787 regval |= (BIT(4)); 788 else 789 regval &= ~(BIT(4)); 790 791 writel(regval, spi_bus->reg_base + SPI_PCI_CTRL_REG_OFFSET(0)); 792 } 793 794 spi_sub_ptr->hw_inst = start++; 795 796 if (iter == 1) { 797 init_completion(&spi_sub_ptr->spi_xfer_done); 798 /* Initialize Interrupts - SPI_INT */ 799 regval = readl(spi_bus->reg_base + 800 SPI_MST_EVENT_MASK_REG_OFFSET(spi_sub_ptr->hw_inst)); 801 regval &= ~SPI_INTR; 802 writel(regval, spi_bus->reg_base + 803 SPI_MST_EVENT_MASK_REG_OFFSET(spi_sub_ptr->hw_inst)); 804 spi_sub_ptr->irq = pci_irq_vector(pdev, iter); 805 ret = devm_request_irq(&pdev->dev, spi_sub_ptr->irq, 806 pci1xxxx_spi_isr, PCI1XXXX_IRQ_FLAGS, 807 pci_name(pdev), spi_sub_ptr); 808 if (ret < 0) { 809 dev_err(&pdev->dev, "Unable to request irq : %d", 810 spi_sub_ptr->irq); 811 ret = -ENODEV; 812 goto error; 813 } 814 } 815 816 spi_host = spi_sub_ptr->spi_host; 817 spi_host->num_chipselect = SPI_CHIP_SEL_COUNT; 818 spi_host->mode_bits = SPI_MODE_0 | SPI_MODE_3 | SPI_RX_DUAL | 819 SPI_TX_DUAL | SPI_LOOP; 820 spi_host->can_dma = pci1xxxx_spi_can_dma; 821 spi_host->transfer_one = pci1xxxx_spi_transfer_one; 822 823 spi_host->set_cs = pci1xxxx_spi_set_cs; 824 spi_host->bits_per_word_mask = SPI_BPW_MASK(8); 825 spi_host->max_speed_hz = PCI1XXXX_SPI_MAX_CLOCK_HZ; 826 spi_host->min_speed_hz = PCI1XXXX_SPI_MIN_CLOCK_HZ; 827 spi_host->flags = SPI_CONTROLLER_MUST_TX; 828 spi_controller_set_devdata(spi_host, spi_sub_ptr); 829 ret = devm_spi_register_controller(dev, spi_host); 830 if (ret) 831 goto error; 832 } 833 pci_set_drvdata(pdev, spi_bus); 834 835 return 0; 836 837 error: 838 pci_release_regions(pdev); 839 return ret; 840 } 841 842 static void store_restore_config(struct pci1xxxx_spi *spi_ptr, 843 struct pci1xxxx_spi_internal *spi_sub_ptr, 844 u8 inst, bool store) 845 { 846 u32 regval; 847 848 if (store) { 849 regval = readl(spi_ptr->reg_base + 850 SPI_MST_CTL_REG_OFFSET(spi_sub_ptr->hw_inst)); 851 regval &= SPI_MST_CTL_DEVSEL_MASK; 852 spi_sub_ptr->prev_val.dev_sel = (regval >> 25) & 7; 853 regval = readl(spi_ptr->reg_base + 854 SPI_PCI_CTRL_REG_OFFSET(spi_sub_ptr->hw_inst)); 855 regval &= SPI_MSI_VECTOR_SEL_MASK; 856 spi_sub_ptr->prev_val.msi_vector_sel = (regval >> 4) & 1; 857 } else { 858 regval = readl(spi_ptr->reg_base + SPI_MST_CTL_REG_OFFSET(inst)); 859 regval &= ~SPI_MST_CTL_DEVSEL_MASK; 860 regval |= (spi_sub_ptr->prev_val.dev_sel << 25); 861 writel(regval, 862 spi_ptr->reg_base + SPI_MST_CTL_REG_OFFSET(inst)); 863 writel((spi_sub_ptr->prev_val.msi_vector_sel << 4), 864 spi_ptr->reg_base + SPI_PCI_CTRL_REG_OFFSET(inst)); 865 } 866 } 867 868 static int pci1xxxx_spi_resume(struct device *dev) 869 { 870 struct pci1xxxx_spi *spi_ptr = dev_get_drvdata(dev); 871 struct pci1xxxx_spi_internal *spi_sub_ptr; 872 u32 regval = SPI_RESUME_CONFIG; 873 u8 iter; 874 875 for (iter = 0; iter < spi_ptr->total_hw_instances; iter++) { 876 spi_sub_ptr = spi_ptr->spi_int[iter]; 877 spi_controller_resume(spi_sub_ptr->spi_host); 878 writel(regval, spi_ptr->reg_base + 879 SPI_MST_EVENT_MASK_REG_OFFSET(iter)); 880 881 /* Restore config at resume */ 882 store_restore_config(spi_ptr, spi_sub_ptr, iter, 0); 883 } 884 885 return 0; 886 } 887 888 static int pci1xxxx_spi_suspend(struct device *dev) 889 { 890 struct pci1xxxx_spi *spi_ptr = dev_get_drvdata(dev); 891 struct pci1xxxx_spi_internal *spi_sub_ptr; 892 u32 reg1 = SPI_SUSPEND_CONFIG; 893 u8 iter; 894 895 for (iter = 0; iter < spi_ptr->total_hw_instances; iter++) { 896 spi_sub_ptr = spi_ptr->spi_int[iter]; 897 898 while (spi_sub_ptr->spi_xfer_in_progress) 899 msleep(20); 900 901 /* Store existing config before suspend */ 902 store_restore_config(spi_ptr, spi_sub_ptr, iter, 1); 903 spi_controller_suspend(spi_sub_ptr->spi_host); 904 writel(reg1, spi_ptr->reg_base + 905 SPI_MST_EVENT_MASK_REG_OFFSET(iter)); 906 } 907 908 return 0; 909 } 910 911 static DEFINE_SIMPLE_DEV_PM_OPS(spi_pm_ops, pci1xxxx_spi_suspend, 912 pci1xxxx_spi_resume); 913 914 static struct pci_driver pci1xxxx_spi_driver = { 915 .name = DRV_NAME, 916 .id_table = pci1xxxx_spi_pci_id_table, 917 .probe = pci1xxxx_spi_probe, 918 .driver = { 919 .pm = pm_sleep_ptr(&spi_pm_ops), 920 }, 921 }; 922 923 module_pci_driver(pci1xxxx_spi_driver); 924 925 MODULE_DESCRIPTION("Microchip Technology Inc. pci1xxxx SPI bus driver"); 926 MODULE_AUTHOR("Tharun Kumar P<tharunkumar.pasumarthi@microchip.com>"); 927 MODULE_AUTHOR("Kumaravel Thiagarajan<kumaravel.thiagarajan@microchip.com>"); 928 MODULE_LICENSE("GPL v2"); 929