kernel/arch/arm/mach-mmp/devices.c

   1 /*
   2  * linux/arch/arm/mach-mmp/devices.c
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/dma-mapping.h>
  12 #include <linux/delay.h>
  13
  14 #include <asm/irq.h>
  15 #include <mach/irqs.h>
  16 #include <mach/devices.h>
  17 #include <mach/cputype.h>
  18 #include <mach/regs-usb.h>
  19
  20 int __init pxa_register_device(struct pxa_device_desc *desc,
  21                                 void *data, size_t size)
  22 {
  23         struct platform_device *pdev;
  24         struct resource res[2 + MAX_RESOURCE_DMA];
  25         int i, ret = 0, nres = 0;
  26
  27         pdev = platform_device_alloc(desc->drv_name, desc->id);
  28         if (pdev == NULL)
  29                 return -ENOMEM;
  30
  31         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
  32
  33         memset(res, 0, sizeof(res));
  34
  35         if (desc->start != -1ul && desc->size > 0) {
  36                 res[nres].start = desc->start;
  37                 res[nres].end   = desc->start + desc->size - 1;
  38                 res[nres].flags = IORESOURCE_MEM;
  39                 nres++;
  40         }
  41
  42         if (desc->irq != NO_IRQ) {
  43                 res[nres].start = desc->irq;
  44                 res[nres].end   = desc->irq;
  45                 res[nres].flags = IORESOURCE_IRQ;
  46                 nres++;
  47         }
  48
  49         for (i = 0; i < MAX_RESOURCE_DMA; i++, nres++) {
  50                 if (desc->dma[i] == 0)
  51                         break;
  52
  53                 res[nres].start = desc->dma[i];
  54                 res[nres].end   = desc->dma[i];
  55                 res[nres].flags = IORESOURCE_DMA;
  56         }
  57
  58         ret = platform_device_add_resources(pdev, res, nres);
  59         if (ret) {
  60                 platform_device_put(pdev);
  61                 return ret;
  62         }
  63
  64         if (data && size) {
  65                 ret = platform_device_add_data(pdev, data, size);
  66                 if (ret) {
  67                         platform_device_put(pdev);
  68                         return ret;
  69                 }
  70         }
  71
  72         return platform_device_add(pdev);
  73 }
  74
  75 #if IS_ENABLED(CONFIG_USB) || IS_ENABLED(CONFIG_USB_GADGET)
  76
  77 /*****************************************************************************
  78  * The registers read/write routines
  79  *****************************************************************************/
  80
  81 static unsigned int u2o_get(void __iomem *base, unsigned int offset)
  82 {
  83         return readl_relaxed(base + offset);
  84 }
  85
  86 static void u2o_set(void __iomem *base, unsigned int offset,
  87                 unsigned int value)
  88 {
  89         u32 reg;
  90
  91         reg = readl_relaxed(base + offset);
  92         reg |= value;
  93         writel_relaxed(reg, base + offset);
  94         readl_relaxed(base + offset);
  95 }
  96
  97 static void u2o_clear(void __iomem *base, unsigned int offset,
  98                 unsigned int value)
  99 {
 100         u32 reg;
 101
 102         reg = readl_relaxed(base + offset);
 103         reg &= ~value;
 104         writel_relaxed(reg, base + offset);
 105         readl_relaxed(base + offset);
 106 }
 107
 108 static void u2o_write(void __iomem *base, unsigned int offset,
 109                 unsigned int value)
 110 {
 111         writel_relaxed(value, base + offset);
 112         readl_relaxed(base + offset);
 113 }
 114
 115 #if IS_ENABLED(CONFIG_USB_MV_UDC) || IS_ENABLED(CONFIG_USB_EHCI_MV)
 116
 117 #if IS_ENABLED(CONFIG_CPU_PXA910) || IS_ENABLED(CONFIG_CPU_PXA168)
 118
 119 static DEFINE_MUTEX(phy_lock);
 120 static int phy_init_cnt;
 121
 122 static int usb_phy_init_internal(void __iomem *base)
 123 {
 124         int loops;
 125
 126         pr_info("Init usb phy!!!\n");
 127
 128         /* Initialize the USB PHY power */
 129         if (cpu_is_pxa910()) {
 130                 u2o_set(base, UTMI_CTRL, (1<<UTMI_CTRL_INPKT_DELAY_SOF_SHIFT)
 131                         | (1<<UTMI_CTRL_PU_REF_SHIFT));
 132         }
 133
 134         u2o_set(base, UTMI_CTRL, 1<<UTMI_CTRL_PLL_PWR_UP_SHIFT);
 135         u2o_set(base, UTMI_CTRL, 1<<UTMI_CTRL_PWR_UP_SHIFT);
 136
 137         /* UTMI_PLL settings */
 138         u2o_clear(base, UTMI_PLL, UTMI_PLL_PLLVDD18_MASK
 139                 | UTMI_PLL_PLLVDD12_MASK | UTMI_PLL_PLLCALI12_MASK
 140                 | UTMI_PLL_FBDIV_MASK | UTMI_PLL_REFDIV_MASK
 141                 | UTMI_PLL_ICP_MASK | UTMI_PLL_KVCO_MASK);
 142
 143         u2o_set(base, UTMI_PLL, 0xee<<UTMI_PLL_FBDIV_SHIFT
 144                 | 0xb<<UTMI_PLL_REFDIV_SHIFT | 3<<UTMI_PLL_PLLVDD18_SHIFT
 145                 | 3<<UTMI_PLL_PLLVDD12_SHIFT | 3<<UTMI_PLL_PLLCALI12_SHIFT
 146                 | 1<<UTMI_PLL_ICP_SHIFT | 3<<UTMI_PLL_KVCO_SHIFT);
 147
 148         /* UTMI_TX */
 149         u2o_clear(base, UTMI_TX, UTMI_TX_REG_EXT_FS_RCAL_EN_MASK
 150                 | UTMI_TX_TXVDD12_MASK | UTMI_TX_CK60_PHSEL_MASK
 151                 | UTMI_TX_IMPCAL_VTH_MASK | UTMI_TX_REG_EXT_FS_RCAL_MASK
 152                 | UTMI_TX_AMP_MASK);
 153         u2o_set(base, UTMI_TX, 3<<UTMI_TX_TXVDD12_SHIFT
 154                 | 4<<UTMI_TX_CK60_PHSEL_SHIFT | 4<<UTMI_TX_IMPCAL_VTH_SHIFT
 155                 | 8<<UTMI_TX_REG_EXT_FS_RCAL_SHIFT | 3<<UTMI_TX_AMP_SHIFT);
 156
 157         /* UTMI_RX */
 158         u2o_clear(base, UTMI_RX, UTMI_RX_SQ_THRESH_MASK
 159                 | UTMI_REG_SQ_LENGTH_MASK);
 160         u2o_set(base, UTMI_RX, 7<<UTMI_RX_SQ_THRESH_SHIFT
 161                 | 2<<UTMI_REG_SQ_LENGTH_SHIFT);
 162
 163         /* UTMI_IVREF */
 164         if (cpu_is_pxa168())
 165                 /* fixing Microsoft Altair board interface with NEC hub issue -
 166                  * Set UTMI_IVREF from 0x4a3 to 0x4bf */
 167                 u2o_write(base, UTMI_IVREF, 0x4bf);
 168
 169         /* toggle VCOCAL_START bit of UTMI_PLL */
 170         udelay(200);
 171         u2o_set(base, UTMI_PLL, VCOCAL_START);
 172         udelay(40);
 173         u2o_clear(base, UTMI_PLL, VCOCAL_START);
 174
 175         /* toggle REG_RCAL_START bit of UTMI_TX */
 176         udelay(400);
 177         u2o_set(base, UTMI_TX, REG_RCAL_START);
 178         udelay(40);
 179         u2o_clear(base, UTMI_TX, REG_RCAL_START);
 180         udelay(400);
 181
 182         /* Make sure PHY PLL is ready */
 183         loops = 0;
 184         while ((u2o_get(base, UTMI_PLL) & PLL_READY) == 0) {
 185                 mdelay(1);
 186                 loops++;
 187                 if (loops > 100) {
 188                         printk(KERN_WARNING "calibrate timeout, UTMI_PLL %x\n",
 189                                 u2o_get(base, UTMI_PLL));
 190                         break;
 191                 }
 192         }
 193
 194         if (cpu_is_pxa168()) {
 195                 u2o_set(base, UTMI_RESERVE, 1 << 5);
 196                 /* Turn on UTMI PHY OTG extension */
 197                 u2o_write(base, UTMI_OTG_ADDON, 1);
 198         }
 199
 200         return 0;
 201 }
 202
 203 static int usb_phy_deinit_internal(void __iomem *base)
 204 {
 205         pr_info("Deinit usb phy!!!\n");
 206
 207         if (cpu_is_pxa168())
 208                 u2o_clear(base, UTMI_OTG_ADDON, UTMI_OTG_ADDON_OTG_ON);
 209
 210         u2o_clear(base, UTMI_CTRL, UTMI_CTRL_RXBUF_PDWN);
 211         u2o_clear(base, UTMI_CTRL, UTMI_CTRL_TXBUF_PDWN);
 212         u2o_clear(base, UTMI_CTRL, UTMI_CTRL_USB_CLK_EN);
 213         u2o_clear(base, UTMI_CTRL, 1<<UTMI_CTRL_PWR_UP_SHIFT);
 214         u2o_clear(base, UTMI_CTRL, 1<<UTMI_CTRL_PLL_PWR_UP_SHIFT);
 215
 216         return 0;
 217 }
 218
 219 int pxa_usb_phy_init(void __iomem *phy_reg)
 220 {
 221         mutex_lock(&phy_lock);
 222         if (phy_init_cnt++ == 0)
 223                 usb_phy_init_internal(phy_reg);
 224         mutex_unlock(&phy_lock);
 225         return 0;
 226 }
 227
 228 void pxa_usb_phy_deinit(void __iomem *phy_reg)
 229 {
 230         WARN_ON(phy_init_cnt == 0);
 231
 232         mutex_lock(&phy_lock);
 233         if (--phy_init_cnt == 0)
 234                 usb_phy_deinit_internal(phy_reg);
 235         mutex_unlock(&phy_lock);
 236 }
 237 #endif
 238 #endif
 239 #endif
 240
 241 #if IS_ENABLED(CONFIG_USB_SUPPORT)
 242 static u64 usb_dma_mask = ~(u32)0;
 243
 244 #if IS_ENABLED(CONFIG_USB_MV_UDC)
 245 struct resource pxa168_u2o_resources[] = {
 246         /* regbase */
 247         [0] = {
 248                 .start  = PXA168_U2O_REGBASE + U2x_CAPREGS_OFFSET,
 249                 .end    = PXA168_U2O_REGBASE + USB_REG_RANGE,
 250                 .flags  = IORESOURCE_MEM,
 251                 .name   = "capregs",
 252         },
 253         /* phybase */
 254         [1] = {
 255                 .start  = PXA168_U2O_PHYBASE,
 256                 .end    = PXA168_U2O_PHYBASE + USB_PHY_RANGE,
 257                 .flags  = IORESOURCE_MEM,
 258                 .name   = "phyregs",
 259         },
 260         [2] = {
 261                 .start  = IRQ_PXA168_USB1,
 262                 .end    = IRQ_PXA168_USB1,
 263                 .flags  = IORESOURCE_IRQ,
 264         },
 265 };
 266
 267 struct platform_device pxa168_device_u2o = {
 268         .name           = "mv-udc",
 269         .id             = -1,
 270         .resource       = pxa168_u2o_resources,
 271         .num_resources  = ARRAY_SIZE(pxa168_u2o_resources),
 272         .dev            =  {
 273                 .dma_mask       = &usb_dma_mask,
 274                 .coherent_dma_mask = 0xffffffff,
 275         }
 276 };
 277 #endif /* CONFIG_USB_MV_UDC */
 278
 279 #if IS_ENABLED(CONFIG_USB_EHCI_MV_U2O)
 280 struct resource pxa168_u2oehci_resources[] = {
 281         /* regbase */
 282         [0] = {
 283                 .start  = PXA168_U2O_REGBASE + U2x_CAPREGS_OFFSET,
 284                 .end    = PXA168_U2O_REGBASE + USB_REG_RANGE,
 285                 .flags  = IORESOURCE_MEM,
 286                 .name   = "capregs",
 287         },
 288         /* phybase */
 289         [1] = {
 290                 .start  = PXA168_U2O_PHYBASE,
 291                 .end    = PXA168_U2O_PHYBASE + USB_PHY_RANGE,
 292                 .flags  = IORESOURCE_MEM,
 293                 .name   = "phyregs",
 294         },
 295         [2] = {
 296                 .start  = IRQ_PXA168_USB1,
 297                 .end    = IRQ_PXA168_USB1,
 298                 .flags  = IORESOURCE_IRQ,
 299         },
 300 };
 301
 302 struct platform_device pxa168_device_u2oehci = {
 303         .name           = "pxa-u2oehci",
 304         .id             = -1,
 305         .dev            = {
 306                 .dma_mask               = &usb_dma_mask,
 307                 .coherent_dma_mask      = 0xffffffff,
 308         },
 309
 310         .num_resources  = ARRAY_SIZE(pxa168_u2oehci_resources),
 311         .resource       = pxa168_u2oehci_resources,
 312 };
 313 #endif
 314
 315 #if IS_ENABLED(CONFIG_USB_MV_OTG)
 316 struct resource pxa168_u2ootg_resources[] = {
 317         /* regbase */
 318         [0] = {
 319                 .start  = PXA168_U2O_REGBASE + U2x_CAPREGS_OFFSET,
 320                 .end    = PXA168_U2O_REGBASE + USB_REG_RANGE,
 321                 .flags  = IORESOURCE_MEM,
 322                 .name   = "capregs",
 323         },
 324         /* phybase */
 325         [1] = {
 326                 .start  = PXA168_U2O_PHYBASE,
 327                 .end    = PXA168_U2O_PHYBASE + USB_PHY_RANGE,
 328                 .flags  = IORESOURCE_MEM,
 329                 .name   = "phyregs",
 330         },
 331         [2] = {
 332                 .start  = IRQ_PXA168_USB1,
 333                 .end    = IRQ_PXA168_USB1,
 334                 .flags  = IORESOURCE_IRQ,
 335         },
 336 };
 337
 338 struct platform_device pxa168_device_u2ootg = {
 339         .name           = "mv-otg",
 340         .id             = -1,
 341         .dev  = {
 342                 .dma_mask          = &usb_dma_mask,
 343                 .coherent_dma_mask = 0xffffffff,
 344         },
 345
 346         .num_resources  = ARRAY_SIZE(pxa168_u2ootg_resources),
 347         .resource      = pxa168_u2ootg_resources,
 348 };
 349 #endif /* CONFIG_USB_MV_OTG */
 350
 351 #endif