arch/mips/netlogic/xlr/platform.c

   1 /*
   2  * Copyright 2011, Netlogic Microsystems.
   3  * Copyright 2004, Matt Porter <mporter@kernel.crashing.org>
   4  *
   5  * This file is licensed under the terms of the GNU General Public
   6  * License version 2.  This program is licensed "as is" without any
   7  * warranty of any kind, whether express or implied.
   8  */
   9
  10 #include <linux/device.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/resource.h>
  15 #include <linux/serial_8250.h>
  16 #include <linux/serial_reg.h>
  17 #include <linux/i2c.h>
  18 #include <linux/usb/ehci_pdriver.h>
  19 #include <linux/usb/ohci_pdriver.h>
  20
  21 #include <asm/netlogic/haldefs.h>
  22 #include <asm/netlogic/xlr/iomap.h>
  23 #include <asm/netlogic/xlr/pic.h>
  24 #include <asm/netlogic/xlr/xlr.h>
  25
  26 static unsigned int nlm_xlr_uart_in(struct uart_port *p, int offset)
  27 {
  28         uint64_t uartbase;
  29         unsigned int value;
  30
  31         /* sign extend to 64 bits, if needed */
  32         uartbase = (uint64_t)(long)p->membase;
  33         value = nlm_read_reg(uartbase, offset);
  34
  35         /* See XLR/XLS errata */
  36         if (offset == UART_MSR)
  37                 value ^= 0xF0;
  38         else if (offset == UART_MCR)
  39                 value ^= 0x3;
  40
  41         return value;
  42 }
  43
  44 static void nlm_xlr_uart_out(struct uart_port *p, int offset, int value)
  45 {
  46         uint64_t uartbase;
  47
  48         /* sign extend to 64 bits, if needed */
  49         uartbase = (uint64_t)(long)p->membase;
  50
  51         /* See XLR/XLS errata */
  52         if (offset == UART_MSR)
  53                 value ^= 0xF0;
  54         else if (offset == UART_MCR)
  55                 value ^= 0x3;
  56
  57         nlm_write_reg(uartbase, offset, value);
  58 }
  59
  60 #define PORT(_irq)                                      \
  61         {                                               \
  62                 .irq            = _irq,                 \
  63                 .regshift       = 2,                    \
  64                 .iotype         = UPIO_MEM32,           \
  65                 .flags          = (UPF_SKIP_TEST |      \
  66                          UPF_FIXED_TYPE | UPF_BOOT_AUTOCONF),\
  67                 .uartclk        = PIC_CLK_HZ,           \
  68                 .type           = PORT_16550A,          \
  69                 .serial_in      = nlm_xlr_uart_in,      \
  70                 .serial_out     = nlm_xlr_uart_out,     \
  71         }
  72
  73 static struct plat_serial8250_port xlr_uart_data[] = {
  74         PORT(PIC_UART_0_IRQ),
  75         PORT(PIC_UART_1_IRQ),
  76         {},
  77 };
  78
  79 static struct platform_device uart_device = {
  80         .name           = "serial8250",
  81         .id             = PLAT8250_DEV_PLATFORM,
  82         .dev = {
  83                 .platform_data = xlr_uart_data,
  84         },
  85 };
  86
  87 static int __init nlm_uart_init(void)
  88 {
  89         unsigned long uartbase;
  90
  91         uartbase = (unsigned long)nlm_mmio_base(NETLOGIC_IO_UART_0_OFFSET);
  92         xlr_uart_data[0].membase = (void __iomem *)uartbase;
  93         xlr_uart_data[0].mapbase = CPHYSADDR(uartbase);
  94
  95         uartbase = (unsigned long)nlm_mmio_base(NETLOGIC_IO_UART_1_OFFSET);
  96         xlr_uart_data[1].membase = (void __iomem *)uartbase;
  97         xlr_uart_data[1].mapbase = CPHYSADDR(uartbase);
  98
  99         return platform_device_register(&uart_device);
 100 }
 101
 102 arch_initcall(nlm_uart_init);
 103
 104 #ifdef CONFIG_USB
 105 /* Platform USB devices, only on XLS chips */
 106 static u64 xls_usb_dmamask = ~(u32)0;
 107 #define USB_PLATFORM_DEV(n, i, irq)                                     \
 108         {                                                               \
 109                 .name           = n,                                    \
 110                 .id             = i,                                    \
 111                 .num_resources  = 2,                                    \
 112                 .dev            = {                                     \
 113                         .dma_mask       = &xls_usb_dmamask,             \
 114                         .coherent_dma_mask = 0xffffffff,                \
 115                 },                                                      \
 116                 .resource       = (struct resource[]) {                 \
 117                         {                                               \
 118                                 .flags = IORESOURCE_MEM,                \
 119                         },                                              \
 120                         {                                               \
 121                                 .start  = irq,                          \
 122                                 .end    = irq,                          \
 123                                 .flags = IORESOURCE_IRQ,                \
 124                         },                                              \
 125                 },                                                      \
 126         }
 127
 128 static struct usb_ehci_pdata xls_usb_ehci_pdata = {
 129         .caps_offset    = 0,
 130 };
 131
 132 static struct usb_ohci_pdata xls_usb_ohci_pdata;
 133
 134 static struct platform_device xls_usb_ehci_device =
 135                          USB_PLATFORM_DEV("ehci-platform", 0, PIC_USB_IRQ);
 136 static struct platform_device xls_usb_ohci_device_0 =
 137                          USB_PLATFORM_DEV("ohci-platform", 1, PIC_USB_IRQ);
 138 static struct platform_device xls_usb_ohci_device_1 =
 139                          USB_PLATFORM_DEV("ohci-platform", 2, PIC_USB_IRQ);
 140
 141 static struct platform_device *xls_platform_devices[] = {
 142         &xls_usb_ehci_device,
 143         &xls_usb_ohci_device_0,
 144         &xls_usb_ohci_device_1,
 145 };
 146
 147 int xls_platform_usb_init(void)
 148 {
 149         uint64_t usb_mmio, gpio_mmio;
 150         unsigned long memres;
 151         uint32_t val;
 152
 153         if (!nlm_chip_is_xls())
 154                 return 0;
 155
 156         gpio_mmio = nlm_mmio_base(NETLOGIC_IO_GPIO_OFFSET);
 157         usb_mmio  = nlm_mmio_base(NETLOGIC_IO_USB_1_OFFSET);
 158
 159         /* Clear Rogue Phy INTs */
 160         nlm_write_reg(usb_mmio, 49, 0x10000000);
 161         /* Enable all interrupts */
 162         nlm_write_reg(usb_mmio, 50, 0x1f000000);
 163
 164         /* Enable ports */
 165         nlm_write_reg(usb_mmio,  1, 0x07000500);
 166
 167         val = nlm_read_reg(gpio_mmio, 21);
 168         if (((val >> 22) & 0x01) == 0) {
 169                 pr_info("Detected USB Device mode - Not supported!\n");
 170                 nlm_write_reg(usb_mmio,  0, 0x01000000);
 171                 return 0;
 172         }
 173
 174         pr_info("Detected USB Host mode - Adding XLS USB devices.\n");
 175         /* Clear reset, host mode */
 176         nlm_write_reg(usb_mmio,  0, 0x02000000);
 177
 178         /* Memory resource for various XLS usb ports */
 179         usb_mmio = nlm_mmio_base(NETLOGIC_IO_USB_0_OFFSET);
 180         memres = CPHYSADDR((unsigned long)usb_mmio);
 181         xls_usb_ehci_device.resource[0].start = memres;
 182         xls_usb_ehci_device.resource[0].end = memres + 0x400 - 1;
 183         xls_usb_ehci_device.dev.platform_data = &xls_usb_ehci_pdata;
 184
 185         memres += 0x400;
 186         xls_usb_ohci_device_0.resource[0].start = memres;
 187         xls_usb_ohci_device_0.resource[0].end = memres + 0x400 - 1;
 188         xls_usb_ohci_device_0.dev.platform_data = &xls_usb_ohci_pdata;
 189
 190         memres += 0x400;
 191         xls_usb_ohci_device_1.resource[0].start = memres;
 192         xls_usb_ohci_device_1.resource[0].end = memres + 0x400 - 1;
 193         xls_usb_ohci_device_1.dev.platform_data = &xls_usb_ohci_pdata;
 194
 195         return platform_add_devices(xls_platform_devices,
 196                                 ARRAY_SIZE(xls_platform_devices));
 197 }
 198
 199 arch_initcall(xls_platform_usb_init);
 200 #endif
 201
 202 #ifdef CONFIG_I2C
 203 static struct i2c_board_info nlm_i2c_board_info1[] __initdata = {
 204         /* All XLR boards have this RTC and Max6657 Temp Chip */
 205         [0] = {
 206                 .type   = "ds1374",
 207                 .addr   = 0x68
 208         },
 209         [1] = {
 210                 .type   = "lm90",
 211                 .addr   = 0x4c
 212         },
 213 };
 214
 215 static struct resource i2c_resources[] = {
 216         [0] = {
 217                 .start  = 0,    /* filled at init */
 218                 .end    = 0,
 219                 .flags  = IORESOURCE_MEM,
 220         },
 221 };
 222
 223 static struct platform_device nlm_xlr_i2c_1 = {
 224         .name           = "xlr-i2cbus",
 225         .id             = 1,
 226         .num_resources  = 1,
 227         .resource       = i2c_resources,
 228 };
 229
 230 static int __init nlm_i2c_init(void)
 231 {
 232         int err = 0;
 233         unsigned int offset;
 234
 235         /* I2C bus 0 does not have any useful devices, configure only bus 1 */
 236         offset = NETLOGIC_IO_I2C_1_OFFSET;
 237         nlm_xlr_i2c_1.resource[0].start = CPHYSADDR(nlm_mmio_base(offset));
 238         nlm_xlr_i2c_1.resource[0].end = nlm_xlr_i2c_1.resource[0].start + 0xfff;
 239
 240         platform_device_register(&nlm_xlr_i2c_1);
 241
 242         err = i2c_register_board_info(1, nlm_i2c_board_info1,
 243                                 ARRAY_SIZE(nlm_i2c_board_info1));
 244         if (err < 0)
 245                 pr_err("nlm-i2c: cannot register board I2C devices\n");
 246         return err;
 247 }
 248
 249 arch_initcall(nlm_i2c_init);
 250 #endif