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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / arch / mips / alchemy / common / platform.c
blobb8f3397c59c92a7cc61563017eb2e97ac71fec5a
1 /*
2 * Platform device support for Au1x00 SoCs.
3 *
4 * Copyright 2004, Matt Porter <mporter@kernel.crashing.org>
5 *
6 * (C) Copyright Embedded Alley Solutions, Inc 2005
7 * Author: Pantelis Antoniou <pantelis@embeddedalley.com>
8 *
9 * This file is licensed under the terms of the GNU General Public
10 * License version 2. This program is licensed "as is" without any
11 * warranty of any kind, whether express or implied.
12 */
13
14 #include <linux/clk.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/etherdevice.h>
17 #include <linux/init.h>
18 #include <linux/platform_device.h>
19 #include <linux/serial_8250.h>
20 #include <linux/slab.h>
21 #include <linux/usb/ehci_pdriver.h>
22 #include <linux/usb/ohci_pdriver.h>
23
24 #include <asm/mach-au1x00/au1000.h>
25 #include <asm/mach-au1x00/au1xxx_dbdma.h>
26 #include <asm/mach-au1x00/au1100_mmc.h>
27 #include <asm/mach-au1x00/au1xxx_eth.h>
28
29 #include <prom.h>
30
31 static void alchemy_8250_pm(struct uart_port *port, unsigned int state,
32 unsigned int old_state)
33 {
34 #ifdef CONFIG_SERIAL_8250
35 switch (state) {
36 case 0:
37 alchemy_uart_enable(CPHYSADDR(port->membase));
38 serial8250_do_pm(port, state, old_state);
39 break;
40 case 3: /* power off */
41 serial8250_do_pm(port, state, old_state);
42 alchemy_uart_disable(CPHYSADDR(port->membase));
43 break;
44 default:
45 serial8250_do_pm(port, state, old_state);
46 break;
47 }
48 #endif
49 }
50
51 #define PORT(_base, _irq) \
52 { \
53 .mapbase = _base, \
54 .irq = _irq, \
55 .regshift = 2, \
56 .iotype = UPIO_AU, \
57 .flags = UPF_SKIP_TEST | UPF_IOREMAP | \
58 UPF_FIXED_TYPE, \
59 .type = PORT_16550A, \
60 .pm = alchemy_8250_pm, \
61 }
62
63 static struct plat_serial8250_port au1x00_uart_data[][4] __initdata = {
64 [ALCHEMY_CPU_AU1000] = {
65 PORT(AU1000_UART0_PHYS_ADDR, AU1000_UART0_INT),
66 PORT(AU1000_UART1_PHYS_ADDR, AU1000_UART1_INT),
67 PORT(AU1000_UART2_PHYS_ADDR, AU1000_UART2_INT),
68 PORT(AU1000_UART3_PHYS_ADDR, AU1000_UART3_INT),
69 },
70 [ALCHEMY_CPU_AU1500] = {
71 PORT(AU1000_UART0_PHYS_ADDR, AU1500_UART0_INT),
72 PORT(AU1000_UART3_PHYS_ADDR, AU1500_UART3_INT),
73 },
74 [ALCHEMY_CPU_AU1100] = {
75 PORT(AU1000_UART0_PHYS_ADDR, AU1100_UART0_INT),
76 PORT(AU1000_UART1_PHYS_ADDR, AU1100_UART1_INT),
77 PORT(AU1000_UART3_PHYS_ADDR, AU1100_UART3_INT),
78 },
79 [ALCHEMY_CPU_AU1550] = {
80 PORT(AU1000_UART0_PHYS_ADDR, AU1550_UART0_INT),
81 PORT(AU1000_UART1_PHYS_ADDR, AU1550_UART1_INT),
82 PORT(AU1000_UART3_PHYS_ADDR, AU1550_UART3_INT),
83 },
84 [ALCHEMY_CPU_AU1200] = {
85 PORT(AU1000_UART0_PHYS_ADDR, AU1200_UART0_INT),
86 PORT(AU1000_UART1_PHYS_ADDR, AU1200_UART1_INT),
87 },
88 [ALCHEMY_CPU_AU1300] = {
89 PORT(AU1300_UART0_PHYS_ADDR, AU1300_UART0_INT),
90 PORT(AU1300_UART1_PHYS_ADDR, AU1300_UART1_INT),
91 PORT(AU1300_UART2_PHYS_ADDR, AU1300_UART2_INT),
92 PORT(AU1300_UART3_PHYS_ADDR, AU1300_UART3_INT),
93 },
94 };
95
96 static struct platform_device au1xx0_uart_device = {
97 .name = "serial8250",
98 .id = PLAT8250_DEV_AU1X00,
99 };
100
101 static void __init alchemy_setup_uarts(int ctype)
102 {
103 long uartclk;
104 int s = sizeof(struct plat_serial8250_port);
105 int c = alchemy_get_uarts(ctype);
106 struct plat_serial8250_port *ports;
107 struct clk *clk = clk_get(NULL, ALCHEMY_PERIPH_CLK);
108
109 if (IS_ERR(clk))
110 return;
111 if (clk_prepare_enable(clk)) {
112 clk_put(clk);
113 return;
114 }
115 uartclk = clk_get_rate(clk);
116 clk_put(clk);
117
118 ports = kcalloc(s, (c + 1), GFP_KERNEL);
119 if (!ports) {
120 printk(KERN_INFO "Alchemy: no memory for UART data\n");
121 return;
122 }
123 memcpy(ports, au1x00_uart_data[ctype], s * c);
124 au1xx0_uart_device.dev.platform_data = ports;
125
126 /* Fill up uartclk. */
127 for (s = 0; s < c; s++)
128 ports[s].uartclk = uartclk;
129 if (platform_device_register(&au1xx0_uart_device))
130 printk(KERN_INFO "Alchemy: failed to register UARTs\n");
131 }
132
133
134 static u64 alchemy_all_dmamask = DMA_BIT_MASK(32);
135
136 /* Power on callback for the ehci platform driver */
137 static int alchemy_ehci_power_on(struct platform_device *pdev)
138 {
139 return alchemy_usb_control(ALCHEMY_USB_EHCI0, 1);
140 }
141
142 /* Power off/suspend callback for the ehci platform driver */
143 static void alchemy_ehci_power_off(struct platform_device *pdev)
144 {
145 alchemy_usb_control(ALCHEMY_USB_EHCI0, 0);
146 }
147
148 static struct usb_ehci_pdata alchemy_ehci_pdata = {
149 .no_io_watchdog = 1,
150 .power_on = alchemy_ehci_power_on,
151 .power_off = alchemy_ehci_power_off,
152 .power_suspend = alchemy_ehci_power_off,
153 };
154
155 /* Power on callback for the ohci platform driver */
156 static int alchemy_ohci_power_on(struct platform_device *pdev)
157 {
158 int unit;
159
160 unit = (pdev->id == 1) ?
161 ALCHEMY_USB_OHCI1 : ALCHEMY_USB_OHCI0;
162
163 return alchemy_usb_control(unit, 1);
164 }
165
166 /* Power off/suspend callback for the ohci platform driver */
167 static void alchemy_ohci_power_off(struct platform_device *pdev)
168 {
169 int unit;
170
171 unit = (pdev->id == 1) ?
172 ALCHEMY_USB_OHCI1 : ALCHEMY_USB_OHCI0;
173
174 alchemy_usb_control(unit, 0);
175 }
176
177 static struct usb_ohci_pdata alchemy_ohci_pdata = {
178 .power_on = alchemy_ohci_power_on,
179 .power_off = alchemy_ohci_power_off,
180 .power_suspend = alchemy_ohci_power_off,
181 };
182
183 static unsigned long alchemy_ohci_data[][2] __initdata = {
184 [ALCHEMY_CPU_AU1000] = { AU1000_USB_OHCI_PHYS_ADDR, AU1000_USB_HOST_INT },
185 [ALCHEMY_CPU_AU1500] = { AU1000_USB_OHCI_PHYS_ADDR, AU1500_USB_HOST_INT },
186 [ALCHEMY_CPU_AU1100] = { AU1000_USB_OHCI_PHYS_ADDR, AU1100_USB_HOST_INT },
187 [ALCHEMY_CPU_AU1550] = { AU1550_USB_OHCI_PHYS_ADDR, AU1550_USB_HOST_INT },
188 [ALCHEMY_CPU_AU1200] = { AU1200_USB_OHCI_PHYS_ADDR, AU1200_USB_INT },
189 [ALCHEMY_CPU_AU1300] = { AU1300_USB_OHCI0_PHYS_ADDR, AU1300_USB_INT },
190 };
191
192 static unsigned long alchemy_ehci_data[][2] __initdata = {
193 [ALCHEMY_CPU_AU1200] = { AU1200_USB_EHCI_PHYS_ADDR, AU1200_USB_INT },
194 [ALCHEMY_CPU_AU1300] = { AU1300_USB_EHCI_PHYS_ADDR, AU1300_USB_INT },
195 };
196
197 static int __init _new_usbres(struct resource **r, struct platform_device **d)
198 {
199 *r = kcalloc(2, sizeof(struct resource), GFP_KERNEL);
200 if (!*r)
201 return -ENOMEM;
202 *d = kzalloc(sizeof(struct platform_device), GFP_KERNEL);
203 if (!*d) {
204 kfree(*r);
205 return -ENOMEM;
206 }
207
208 (*d)->dev.coherent_dma_mask = DMA_BIT_MASK(32);
209 (*d)->num_resources = 2;
210 (*d)->resource = *r;
211
212 return 0;
213 }
214
215 static void __init alchemy_setup_usb(int ctype)
216 {
217 struct resource *res;
218 struct platform_device *pdev;
219
220 /* setup OHCI0. Every variant has one */
221 if (_new_usbres(&res, &pdev))
222 return;
223
224 res[0].start = alchemy_ohci_data[ctype][0];
225 res[0].end = res[0].start + 0x100 - 1;
226 res[0].flags = IORESOURCE_MEM;
227 res[1].start = alchemy_ohci_data[ctype][1];
228 res[1].end = res[1].start;
229 res[1].flags = IORESOURCE_IRQ;
230 pdev->name = "ohci-platform";
231 pdev->id = 0;
232 pdev->dev.dma_mask = &alchemy_all_dmamask;
233 pdev->dev.platform_data = &alchemy_ohci_pdata;
234
235 if (platform_device_register(pdev))
236 printk(KERN_INFO "Alchemy USB: cannot add OHCI0\n");
237
238
239 /* setup EHCI0: Au1200/Au1300 */
240 if ((ctype == ALCHEMY_CPU_AU1200) || (ctype == ALCHEMY_CPU_AU1300)) {
241 if (_new_usbres(&res, &pdev))
242 return;
243
244 res[0].start = alchemy_ehci_data[ctype][0];
245 res[0].end = res[0].start + 0x100 - 1;
246 res[0].flags = IORESOURCE_MEM;
247 res[1].start = alchemy_ehci_data[ctype][1];
248 res[1].end = res[1].start;
249 res[1].flags = IORESOURCE_IRQ;
250 pdev->name = "ehci-platform";
251 pdev->id = 0;
252 pdev->dev.dma_mask = &alchemy_all_dmamask;
253 pdev->dev.platform_data = &alchemy_ehci_pdata;
254
255 if (platform_device_register(pdev))
256 printk(KERN_INFO "Alchemy USB: cannot add EHCI0\n");
257 }
258
259 /* Au1300: OHCI1 */
260 if (ctype == ALCHEMY_CPU_AU1300) {
261 if (_new_usbres(&res, &pdev))
262 return;
263
264 res[0].start = AU1300_USB_OHCI1_PHYS_ADDR;
265 res[0].end = res[0].start + 0x100 - 1;
266 res[0].flags = IORESOURCE_MEM;
267 res[1].start = AU1300_USB_INT;
268 res[1].end = res[1].start;
269 res[1].flags = IORESOURCE_IRQ;
270 pdev->name = "ohci-platform";
271 pdev->id = 1;
272 pdev->dev.dma_mask = &alchemy_all_dmamask;
273 pdev->dev.platform_data = &alchemy_ohci_pdata;
274
275 if (platform_device_register(pdev))
276 printk(KERN_INFO "Alchemy USB: cannot add OHCI1\n");
277 }
278 }
279
280 /* Macro to help defining the Ethernet MAC resources */
281 #define MAC_RES_COUNT 4 /* MAC regs, MAC en, MAC INT, MACDMA regs */
282 #define MAC_RES(_base, _enable, _irq, _macdma) \
283 { \
284 .start = _base, \
285 .end = _base + 0xffff, \
286 .flags = IORESOURCE_MEM, \
287 }, \
288 { \
289 .start = _enable, \
290 .end = _enable + 0x3, \
291 .flags = IORESOURCE_MEM, \
292 }, \
293 { \
294 .start = _irq, \
295 .end = _irq, \
296 .flags = IORESOURCE_IRQ \
297 }, \
298 { \
299 .start = _macdma, \
300 .end = _macdma + 0x1ff, \
301 .flags = IORESOURCE_MEM, \
302 }
303
304 static struct resource au1xxx_eth0_resources[][MAC_RES_COUNT] __initdata = {
305 [ALCHEMY_CPU_AU1000] = {
306 MAC_RES(AU1000_MAC0_PHYS_ADDR,
307 AU1000_MACEN_PHYS_ADDR,
308 AU1000_MAC0_DMA_INT,
309 AU1000_MACDMA0_PHYS_ADDR)
310 },
311 [ALCHEMY_CPU_AU1500] = {
312 MAC_RES(AU1500_MAC0_PHYS_ADDR,
313 AU1500_MACEN_PHYS_ADDR,
314 AU1500_MAC0_DMA_INT,
315 AU1000_MACDMA0_PHYS_ADDR)
316 },
317 [ALCHEMY_CPU_AU1100] = {
318 MAC_RES(AU1000_MAC0_PHYS_ADDR,
319 AU1000_MACEN_PHYS_ADDR,
320 AU1100_MAC0_DMA_INT,
321 AU1000_MACDMA0_PHYS_ADDR)
322 },
323 [ALCHEMY_CPU_AU1550] = {
324 MAC_RES(AU1000_MAC0_PHYS_ADDR,
325 AU1000_MACEN_PHYS_ADDR,
326 AU1550_MAC0_DMA_INT,
327 AU1000_MACDMA0_PHYS_ADDR)
328 },
329 };
330
331 static struct au1000_eth_platform_data au1xxx_eth0_platform_data = {
332 .phy1_search_mac0 = 1,
333 };
334
335 static struct platform_device au1xxx_eth0_device = {
336 .name = "au1000-eth",
337 .id = 0,
338 .num_resources = MAC_RES_COUNT,
339 .dev = {
340 .dma_mask = &alchemy_all_dmamask,
341 .coherent_dma_mask = DMA_BIT_MASK(32),
342 .platform_data = &au1xxx_eth0_platform_data,
343 },
344 };
345
346 static struct resource au1xxx_eth1_resources[][MAC_RES_COUNT] __initdata = {
347 [ALCHEMY_CPU_AU1000] = {
348 MAC_RES(AU1000_MAC1_PHYS_ADDR,
349 AU1000_MACEN_PHYS_ADDR + 4,
350 AU1000_MAC1_DMA_INT,
351 AU1000_MACDMA1_PHYS_ADDR)
352 },
353 [ALCHEMY_CPU_AU1500] = {
354 MAC_RES(AU1500_MAC1_PHYS_ADDR,
355 AU1500_MACEN_PHYS_ADDR + 4,
356 AU1500_MAC1_DMA_INT,
357 AU1000_MACDMA1_PHYS_ADDR)
358 },
359 [ALCHEMY_CPU_AU1550] = {
360 MAC_RES(AU1000_MAC1_PHYS_ADDR,
361 AU1000_MACEN_PHYS_ADDR + 4,
362 AU1550_MAC1_DMA_INT,
363 AU1000_MACDMA1_PHYS_ADDR)
364 },
365 };
366
367 static struct au1000_eth_platform_data au1xxx_eth1_platform_data = {
368 .phy1_search_mac0 = 1,
369 };
370
371 static struct platform_device au1xxx_eth1_device = {
372 .name = "au1000-eth",
373 .id = 1,
374 .num_resources = MAC_RES_COUNT,
375 .dev = {
376 .dma_mask = &alchemy_all_dmamask,
377 .coherent_dma_mask = DMA_BIT_MASK(32),
378 .platform_data = &au1xxx_eth1_platform_data,
379 },
380 };
381
382 void __init au1xxx_override_eth_cfg(unsigned int port,
383 struct au1000_eth_platform_data *eth_data)
384 {
385 if (!eth_data || port > 1)
386 return;
387
388 if (port == 0)
389 memcpy(&au1xxx_eth0_platform_data, eth_data,
390 sizeof(struct au1000_eth_platform_data));
391 else
392 memcpy(&au1xxx_eth1_platform_data, eth_data,
393 sizeof(struct au1000_eth_platform_data));
394 }
395
396 static void __init alchemy_setup_macs(int ctype)
397 {
398 int ret, i;
399 unsigned char ethaddr[6];
400 struct resource *macres;
401
402 /* Handle 1st MAC */
403 if (alchemy_get_macs(ctype) < 1)
404 return;
405
406 macres = kmemdup(au1xxx_eth0_resources[ctype],
407 sizeof(struct resource) * MAC_RES_COUNT, GFP_KERNEL);
408 if (!macres) {
409 printk(KERN_INFO "Alchemy: no memory for MAC0 resources\n");
410 return;
411 }
412 au1xxx_eth0_device.resource = macres;
413
414 i = prom_get_ethernet_addr(ethaddr);
415 if (!i && !is_valid_ether_addr(au1xxx_eth0_platform_data.mac))
416 memcpy(au1xxx_eth0_platform_data.mac, ethaddr, 6);
417
418 ret = platform_device_register(&au1xxx_eth0_device);
419 if (ret)
420 printk(KERN_INFO "Alchemy: failed to register MAC0\n");
421
422
423 /* Handle 2nd MAC */
424 if (alchemy_get_macs(ctype) < 2)
425 return;
426
427 macres = kmemdup(au1xxx_eth1_resources[ctype],
428 sizeof(struct resource) * MAC_RES_COUNT, GFP_KERNEL);
429 if (!macres) {
430 printk(KERN_INFO "Alchemy: no memory for MAC1 resources\n");
431 return;
432 }
433 au1xxx_eth1_device.resource = macres;
434
435 ethaddr[5] += 1; /* next addr for 2nd MAC */
436 if (!i && !is_valid_ether_addr(au1xxx_eth1_platform_data.mac))
437 memcpy(au1xxx_eth1_platform_data.mac, ethaddr, 6);
438
439 /* Register second MAC if enabled in pinfunc */
440 if (!(alchemy_rdsys(AU1000_SYS_PINFUNC) & SYS_PF_NI2)) {
441 ret = platform_device_register(&au1xxx_eth1_device);
442 if (ret)
443 printk(KERN_INFO "Alchemy: failed to register MAC1\n");
444 }
445 }
446
447 static int __init au1xxx_platform_init(void)
448 {
449 int ctype = alchemy_get_cputype();
450
451 alchemy_setup_uarts(ctype);
452 alchemy_setup_macs(ctype);
453 alchemy_setup_usb(ctype);
454
455 return 0;
456 }
457
458 arch_initcall(au1xxx_platform_init);
Linux with added FPC-III support