1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2018 Oleksij Rempel <linux@rempel-privat.de> 4 * 5 * Driver for Alcor Micro AU6601 and AU6621 controllers 6 */ 7 8 #include <linux/delay.h> 9 #include <linux/interrupt.h> 10 #include <linux/io.h> 11 #include <linux/irq.h> 12 #include <linux/mfd/core.h> 13 #include <linux/module.h> 14 #include <linux/pci.h> 15 #include <linux/platform_device.h> 16 #include <linux/pm.h> 17 18 #include <linux/alcor_pci.h> 19 20 #define DRV_NAME_ALCOR_PCI "alcor_pci" 21 22 static DEFINE_IDA(alcor_pci_idr); 23 24 static struct mfd_cell alcor_pci_cells[] = { 25 [ALCOR_SD_CARD] = { 26 .name = DRV_NAME_ALCOR_PCI_SDMMC, 27 }, 28 [ALCOR_MS_CARD] = { 29 .name = DRV_NAME_ALCOR_PCI_MS, 30 }, 31 }; 32 33 static const struct alcor_dev_cfg alcor_cfg = { 34 .dma = 0, 35 }; 36 37 static const struct alcor_dev_cfg au6621_cfg = { 38 .dma = 1, 39 }; 40 41 static const struct alcor_dev_cfg au6625_cfg = { 42 .dma = 0, 43 }; 44 45 static const struct pci_device_id pci_ids[] = { 46 { PCI_DEVICE(PCI_ID_ALCOR_MICRO, PCI_ID_AU6601), 47 .driver_data = (kernel_ulong_t)&alcor_cfg }, 48 { PCI_DEVICE(PCI_ID_ALCOR_MICRO, PCI_ID_AU6621), 49 .driver_data = (kernel_ulong_t)&au6621_cfg }, 50 { PCI_DEVICE(PCI_ID_ALCOR_MICRO, PCI_ID_AU6625), 51 .driver_data = (kernel_ulong_t)&au6625_cfg }, 52 {}, 53 }; 54 MODULE_DEVICE_TABLE(pci, pci_ids); 55 56 void alcor_write8(struct alcor_pci_priv *priv, u8 val, unsigned int addr) 57 { 58 writeb(val, priv->iobase + addr); 59 } 60 EXPORT_SYMBOL_GPL(alcor_write8); 61 62 void alcor_write16(struct alcor_pci_priv *priv, u16 val, unsigned int addr) 63 { 64 writew(val, priv->iobase + addr); 65 } 66 EXPORT_SYMBOL_GPL(alcor_write16); 67 68 void alcor_write32(struct alcor_pci_priv *priv, u32 val, unsigned int addr) 69 { 70 writel(val, priv->iobase + addr); 71 } 72 EXPORT_SYMBOL_GPL(alcor_write32); 73 74 void alcor_write32be(struct alcor_pci_priv *priv, u32 val, unsigned int addr) 75 { 76 iowrite32be(val, priv->iobase + addr); 77 } 78 EXPORT_SYMBOL_GPL(alcor_write32be); 79 80 u8 alcor_read8(struct alcor_pci_priv *priv, unsigned int addr) 81 { 82 return readb(priv->iobase + addr); 83 } 84 EXPORT_SYMBOL_GPL(alcor_read8); 85 86 u32 alcor_read32(struct alcor_pci_priv *priv, unsigned int addr) 87 { 88 return readl(priv->iobase + addr); 89 } 90 EXPORT_SYMBOL_GPL(alcor_read32); 91 92 u32 alcor_read32be(struct alcor_pci_priv *priv, unsigned int addr) 93 { 94 return ioread32be(priv->iobase + addr); 95 } 96 EXPORT_SYMBOL_GPL(alcor_read32be); 97 98 static int alcor_pci_probe(struct pci_dev *pdev, 99 const struct pci_device_id *ent) 100 { 101 struct alcor_dev_cfg *cfg; 102 struct alcor_pci_priv *priv; 103 int ret, i, bar = 0; 104 105 cfg = (void *)ent->driver_data; 106 107 ret = pcim_enable_device(pdev); 108 if (ret) 109 return ret; 110 111 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 112 if (!priv) 113 return -ENOMEM; 114 115 ret = ida_alloc(&alcor_pci_idr, GFP_KERNEL); 116 if (ret < 0) 117 return ret; 118 priv->id = ret; 119 120 priv->pdev = pdev; 121 priv->parent_pdev = pdev->bus->self; 122 priv->dev = &pdev->dev; 123 priv->cfg = cfg; 124 priv->irq = pdev->irq; 125 126 ret = pci_request_regions(pdev, DRV_NAME_ALCOR_PCI); 127 if (ret) { 128 dev_err(&pdev->dev, "Cannot request region\n"); 129 ret = -ENOMEM; 130 goto error_free_ida; 131 } 132 133 if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) { 134 dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar); 135 ret = -ENODEV; 136 goto error_release_regions; 137 } 138 139 priv->iobase = pcim_iomap(pdev, bar, 0); 140 if (!priv->iobase) { 141 ret = -ENOMEM; 142 goto error_release_regions; 143 } 144 145 /* make sure irqs are disabled */ 146 alcor_write32(priv, 0, AU6601_REG_INT_ENABLE); 147 alcor_write32(priv, 0, AU6601_MS_INT_ENABLE); 148 149 ret = dma_set_mask_and_coherent(priv->dev, AU6601_SDMA_MASK); 150 if (ret) { 151 dev_err(priv->dev, "Failed to set DMA mask\n"); 152 goto error_release_regions; 153 } 154 155 pci_set_master(pdev); 156 pci_set_drvdata(pdev, priv); 157 158 for (i = 0; i < ARRAY_SIZE(alcor_pci_cells); i++) { 159 alcor_pci_cells[i].platform_data = priv; 160 alcor_pci_cells[i].pdata_size = sizeof(*priv); 161 } 162 ret = mfd_add_devices(&pdev->dev, priv->id, alcor_pci_cells, 163 ARRAY_SIZE(alcor_pci_cells), NULL, 0, NULL); 164 if (ret < 0) 165 goto error_clear_drvdata; 166 167 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1); 168 169 return 0; 170 171 error_clear_drvdata: 172 pci_clear_master(pdev); 173 pci_set_drvdata(pdev, NULL); 174 error_release_regions: 175 pci_release_regions(pdev); 176 error_free_ida: 177 ida_free(&alcor_pci_idr, priv->id); 178 return ret; 179 } 180 181 static void alcor_pci_remove(struct pci_dev *pdev) 182 { 183 struct alcor_pci_priv *priv; 184 185 priv = pci_get_drvdata(pdev); 186 187 mfd_remove_devices(&pdev->dev); 188 189 ida_free(&alcor_pci_idr, priv->id); 190 191 pci_release_regions(pdev); 192 pci_clear_master(pdev); 193 pci_set_drvdata(pdev, NULL); 194 } 195 196 #ifdef CONFIG_PM_SLEEP 197 static int alcor_suspend(struct device *dev) 198 { 199 return 0; 200 } 201 202 static int alcor_resume(struct device *dev) 203 { 204 struct alcor_pci_priv *priv = dev_get_drvdata(dev); 205 206 pci_disable_link_state(priv->pdev, 207 PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1); 208 209 return 0; 210 } 211 #endif /* CONFIG_PM_SLEEP */ 212 213 static SIMPLE_DEV_PM_OPS(alcor_pci_pm_ops, alcor_suspend, alcor_resume); 214 215 static struct pci_driver alcor_driver = { 216 .name = DRV_NAME_ALCOR_PCI, 217 .id_table = pci_ids, 218 .probe = alcor_pci_probe, 219 .remove = alcor_pci_remove, 220 .driver = { 221 .pm = &alcor_pci_pm_ops 222 }, 223 }; 224 225 module_pci_driver(alcor_driver); 226 227 MODULE_AUTHOR("Oleksij Rempel <linux@rempel-privat.de>"); 228 MODULE_DESCRIPTION("PCI driver for Alcor Micro AU6601 Secure Digital Host Controller Interface"); 229 MODULE_LICENSE("GPL"); 230