arch/xtensa/platforms/xtfpga/setup.c

   1 /*
   2  *
   3  * arch/xtensa/platform/xtavnet/setup.c
   4  *
   5  * ...
   6  *
   7  * Authors:     Chris Zankel <chris@zankel.net>
   8  *              Joe Taylor <joe@tensilica.com>
   9  *
  10  * Copyright 2001 - 2006 Tensilica Inc.
  11  *
  12  * This program is free software; you can redistribute  it and/or modify it
  13  * under  the terms of  the GNU General  Public License as published by the
  14  * Free Software Foundation;  either version 2 of the  License, or (at your
  15  * option) any later version.
  16  *
  17  */
  18 #include <linux/stddef.h>
  19 #include <linux/kernel.h>
  20 #include <linux/init.h>
  21 #include <linux/errno.h>
  22 #include <linux/reboot.h>
  23 #include <linux/kdev_t.h>
  24 #include <linux/types.h>
  25 #include <linux/major.h>
  26 #include <linux/console.h>
  27 #include <linux/delay.h>
  28 #include <linux/of.h>
  29 #include <linux/clk-provider.h>
  30 #include <linux/of_address.h>
  31
  32 #include <asm/timex.h>
  33 #include <asm/processor.h>
  34 #include <asm/platform.h>
  35 #include <asm/bootparam.h>
  36 #include <platform/lcd.h>
  37 #include <platform/hardware.h>
  38
  39 void platform_halt(void)
  40 {
  41         lcd_disp_at_pos(" HALT ", 0);
  42         local_irq_disable();
  43         while (1)
  44                 cpu_relax();
  45 }
  46
  47 void platform_power_off(void)
  48 {
  49         lcd_disp_at_pos("POWEROFF", 0);
  50         local_irq_disable();
  51         while (1)
  52                 cpu_relax();
  53 }
  54
  55 void platform_restart(void)
  56 {
  57         /* Flush and reset the mmu, simulate a processor reset, and
  58          * jump to the reset vector. */
  59         cpu_reset();
  60         /* control never gets here */
  61 }
  62
  63 void __init platform_setup(char **cmdline)
  64 {
  65 }
  66
  67 /* early initialization */
  68
  69 void __init platform_init(bp_tag_t *first)
  70 {
  71 }
  72
  73 /* Heartbeat. */
  74
  75 void platform_heartbeat(void)
  76 {
  77 }
  78
  79 #ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
  80
  81 void __init platform_calibrate_ccount(void)
  82 {
  83         ccount_freq = *(long *)XTFPGA_CLKFRQ_VADDR;
  84 }
  85
  86 #endif
  87
  88 #ifdef CONFIG_OF
  89
  90 static void __init xtfpga_clk_setup(struct device_node *np)
  91 {
  92         void __iomem *base = of_iomap(np, 0);
  93         struct clk *clk;
  94         u32 freq;
  95
  96         if (!base) {
  97                 pr_err("%s: invalid address\n", np->name);
  98                 return;
  99         }
 100
 101         freq = __raw_readl(base);
 102         iounmap(base);
 103         clk = clk_register_fixed_rate(NULL, np->name, NULL, 0, freq);
 104
 105         if (IS_ERR(clk)) {
 106                 pr_err("%s: clk registration failed\n", np->name);
 107                 return;
 108         }
 109
 110         if (of_clk_add_provider(np, of_clk_src_simple_get, clk)) {
 111                 pr_err("%s: clk provider registration failed\n", np->name);
 112                 return;
 113         }
 114 }
 115 CLK_OF_DECLARE(xtfpga_clk, "cdns,xtfpga-clock", xtfpga_clk_setup);
 116
 117 #define MAC_LEN 6
 118 static void __init update_local_mac(struct device_node *node)
 119 {
 120         struct property *newmac;
 121         const u8* macaddr;
 122         int prop_len;
 123
 124         macaddr = of_get_property(node, "local-mac-address", &prop_len);
 125         if (macaddr == NULL || prop_len != MAC_LEN)
 126                 return;
 127
 128         newmac = kzalloc(sizeof(*newmac) + MAC_LEN, GFP_KERNEL);
 129         if (newmac == NULL)
 130                 return;
 131
 132         newmac->value = newmac + 1;
 133         newmac->length = MAC_LEN;
 134         newmac->name = kstrdup("local-mac-address", GFP_KERNEL);
 135         if (newmac->name == NULL) {
 136                 kfree(newmac);
 137                 return;
 138         }
 139
 140         memcpy(newmac->value, macaddr, MAC_LEN);
 141         ((u8*)newmac->value)[5] = (*(u32*)DIP_SWITCHES_VADDR) & 0x3f;
 142         of_update_property(node, newmac);
 143 }
 144
 145 static int __init machine_setup(void)
 146 {
 147         struct device_node *eth = NULL;
 148
 149         if ((eth = of_find_compatible_node(eth, NULL, "opencores,ethoc")))
 150                 update_local_mac(eth);
 151         return 0;
 152 }
 153 arch_initcall(machine_setup);
 154
 155 #else
 156
 157 #include <linux/serial_8250.h>
 158 #include <linux/if.h>
 159 #include <net/ethoc.h>
 160 #include <linux/usb/c67x00.h>
 161
 162 /*----------------------------------------------------------------------------
 163  *  Ethernet -- OpenCores Ethernet MAC (ethoc driver)
 164  */
 165
 166 static struct resource ethoc_res[] = {
 167         [0] = { /* register space */
 168                 .start = OETH_REGS_PADDR,
 169                 .end   = OETH_REGS_PADDR + OETH_REGS_SIZE - 1,
 170                 .flags = IORESOURCE_MEM,
 171         },
 172         [1] = { /* buffer space */
 173                 .start = OETH_SRAMBUFF_PADDR,
 174                 .end   = OETH_SRAMBUFF_PADDR + OETH_SRAMBUFF_SIZE - 1,
 175                 .flags = IORESOURCE_MEM,
 176         },
 177         [2] = { /* IRQ number */
 178                 .start = XTENSA_PIC_LINUX_IRQ(OETH_IRQ),
 179                 .end   = XTENSA_PIC_LINUX_IRQ(OETH_IRQ),
 180                 .flags = IORESOURCE_IRQ,
 181         },
 182 };
 183
 184 static struct ethoc_platform_data ethoc_pdata = {
 185         /*
 186          * The MAC address for these boards is 00:50:c2:13:6f:xx.
 187          * The last byte (here as zero) is read from the DIP switches on the
 188          * board.
 189          */
 190         .hwaddr = { 0x00, 0x50, 0xc2, 0x13, 0x6f, 0 },
 191         .phy_id = -1,
 192         .big_endian = XCHAL_HAVE_BE,
 193 };
 194
 195 static struct platform_device ethoc_device = {
 196         .name = "ethoc",
 197         .id = -1,
 198         .num_resources = ARRAY_SIZE(ethoc_res),
 199         .resource = ethoc_res,
 200         .dev = {
 201                 .platform_data = &ethoc_pdata,
 202         },
 203 };
 204
 205 /*----------------------------------------------------------------------------
 206  *  USB Host/Device -- Cypress CY7C67300
 207  */
 208
 209 static struct resource c67x00_res[] = {
 210         [0] = { /* register space */
 211                 .start = C67X00_PADDR,
 212                 .end   = C67X00_PADDR + C67X00_SIZE - 1,
 213                 .flags = IORESOURCE_MEM,
 214         },
 215         [1] = { /* IRQ number */
 216                 .start = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ),
 217                 .end   = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ),
 218                 .flags = IORESOURCE_IRQ,
 219         },
 220 };
 221
 222 static struct c67x00_platform_data c67x00_pdata = {
 223         .sie_config = C67X00_SIE1_HOST | C67X00_SIE2_UNUSED,
 224         .hpi_regstep = 4,
 225 };
 226
 227 static struct platform_device c67x00_device = {
 228         .name = "c67x00",
 229         .id = -1,
 230         .num_resources = ARRAY_SIZE(c67x00_res),
 231         .resource = c67x00_res,
 232         .dev = {
 233                 .platform_data = &c67x00_pdata,
 234         },
 235 };
 236
 237 /*----------------------------------------------------------------------------
 238  *  UART
 239  */
 240
 241 static struct resource serial_resource = {
 242         .start  = DUART16552_PADDR,
 243         .end    = DUART16552_PADDR + 0x1f,
 244         .flags  = IORESOURCE_MEM,
 245 };
 246
 247 static struct plat_serial8250_port serial_platform_data[] = {
 248         [0] = {
 249                 .mapbase        = DUART16552_PADDR,
 250                 .irq            = XTENSA_PIC_LINUX_IRQ(DUART16552_INTNUM),
 251                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
 252                                   UPF_IOREMAP,
 253                 .iotype         = XCHAL_HAVE_BE ? UPIO_MEM32BE : UPIO_MEM32,
 254                 .regshift       = 2,
 255                 .uartclk        = 0,    /* set in xtavnet_init() */
 256         },
 257         { },
 258 };
 259
 260 static struct platform_device xtavnet_uart = {
 261         .name           = "serial8250",
 262         .id             = PLAT8250_DEV_PLATFORM,
 263         .dev            = {
 264                 .platform_data  = serial_platform_data,
 265         },
 266         .num_resources  = 1,
 267         .resource       = &serial_resource,
 268 };
 269
 270 /* platform devices */
 271 static struct platform_device *platform_devices[] __initdata = {
 272         &ethoc_device,
 273         &c67x00_device,
 274         &xtavnet_uart,
 275 };
 276
 277
 278 static int __init xtavnet_init(void)
 279 {
 280         /* Ethernet MAC address.  */
 281         ethoc_pdata.hwaddr[5] = *(u32 *)DIP_SWITCHES_VADDR;
 282
 283         /* Clock rate varies among FPGA bitstreams; board specific FPGA register
 284          * reports the actual clock rate.
 285          */
 286         serial_platform_data[0].uartclk = *(long *)XTFPGA_CLKFRQ_VADDR;
 287
 288
 289         /* register platform devices */
 290         platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
 291
 292         /* ETHOC driver is a bit quiet; at least display Ethernet MAC, so user
 293          * knows whether they set it correctly on the DIP switches.
 294          */
 295         pr_info("XTFPGA: Ethernet MAC %pM\n", ethoc_pdata.hwaddr);
 296         ethoc_pdata.eth_clkfreq = *(long *)XTFPGA_CLKFRQ_VADDR;
 297
 298         return 0;
 299 }
 300
 301 /*
 302  * Register to be done during do_initcalls().
 303  */
 304 arch_initcall(xtavnet_init);
 305
 306 #endif /* CONFIG_OF */