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Linux/arch/xtensa/platforms/xtfpga/setup.c

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  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 */
307 

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