1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Goramo MultiLink router platform code
4 * Copyright (C) 2006-2009 Krzysztof Halasa <khc@pm.waw.pl>
5 */
6
7 #include <linux/delay.h>
8 #include <linux/gpio.h>
9 #include <linux/hdlc.h>
10 #include <linux/io.h>
11 #include <linux/irq.h>
12 #include <linux/kernel.h>
13 #include <linux/pci.h>
14 #include <linux/serial_8250.h>
15 #include <asm/mach-types.h>
16 #include <asm/mach/arch.h>
17 #include <asm/mach/flash.h>
18 #include <asm/mach/pci.h>
19 #include <asm/system_info.h>
20
21 #define SLOT_ETHA 0x0B /* IDSEL = AD21 */
22 #define SLOT_ETHB 0x0C /* IDSEL = AD20 */
23 #define SLOT_MPCI 0x0D /* IDSEL = AD19 */
24 #define SLOT_NEC 0x0E /* IDSEL = AD18 */
25
26 /* GPIO lines */
27 #define GPIO_SCL 0
28 #define GPIO_SDA 1
29 #define GPIO_STR 2
30 #define GPIO_IRQ_NEC 3
31 #define GPIO_IRQ_ETHA 4
32 #define GPIO_IRQ_ETHB 5
33 #define GPIO_HSS0_DCD_N 6
34 #define GPIO_HSS1_DCD_N 7
35 #define GPIO_UART0_DCD 8
36 #define GPIO_UART1_DCD 9
37 #define GPIO_HSS0_CTS_N 10
38 #define GPIO_HSS1_CTS_N 11
39 #define GPIO_IRQ_MPCI 12
40 #define GPIO_HSS1_RTS_N 13
41 #define GPIO_HSS0_RTS_N 14
42 /* GPIO15 is not connected */
43
44 /* Control outputs from 74HC4094 */
45 #define CONTROL_HSS0_CLK_INT 0
46 #define CONTROL_HSS1_CLK_INT 1
47 #define CONTROL_HSS0_DTR_N 2
48 #define CONTROL_HSS1_DTR_N 3
49 #define CONTROL_EXT 4
50 #define CONTROL_AUTO_RESET 5
51 #define CONTROL_PCI_RESET_N 6
52 #define CONTROL_EEPROM_WC_N 7
53
54 /* offsets from start of flash ROM = 0x50000000 */
55 #define CFG_ETH0_ADDRESS 0x40 /* 6 bytes */
56 #define CFG_ETH1_ADDRESS 0x46 /* 6 bytes */
57 #define CFG_REV 0x4C /* u32 */
58 #define CFG_SDRAM_SIZE 0x50 /* u32 */
59 #define CFG_SDRAM_CONF 0x54 /* u32 */
60 #define CFG_SDRAM_MODE 0x58 /* u32 */
61 #define CFG_SDRAM_REFRESH 0x5C /* u32 */
62
63 #define CFG_HW_BITS 0x60 /* u32 */
64 #define CFG_HW_USB_PORTS 0x00000007 /* 0 = no NEC chip, 1-5 = ports # */
65 #define CFG_HW_HAS_PCI_SLOT 0x00000008
66 #define CFG_HW_HAS_ETH0 0x00000010
67 #define CFG_HW_HAS_ETH1 0x00000020
68 #define CFG_HW_HAS_HSS0 0x00000040
69 #define CFG_HW_HAS_HSS1 0x00000080
70 #define CFG_HW_HAS_UART0 0x00000100
71 #define CFG_HW_HAS_UART1 0x00000200
72 #define CFG_HW_HAS_EEPROM 0x00000400
73
74 #define FLASH_CMD_READ_ARRAY 0xFF
75 #define FLASH_CMD_READ_ID 0x90
76 #define FLASH_SER_OFF 0x102 /* 0x81 in 16-bit mode */
77
78 static u32 hw_bits = 0xFFFFFFFD; /* assume all hardware present */;
79 static u8 control_value;
80
81 /*
82 * FIXME: this is reimplementing I2C bit-bangining. Move this
83 * over to using driver/i2c/busses/i2c-gpio.c like all other boards
84 * and register proper I2C device(s) on the bus for this. (See
85 * other IXP4xx boards for examples.)
86 */
set_scl(u8 value)87 static void set_scl(u8 value)
88 {
89 gpio_set_value(GPIO_SCL, !!value);
90 udelay(3);
91 }
92
set_sda(u8 value)93 static void set_sda(u8 value)
94 {
95 gpio_set_value(GPIO_SDA, !!value);
96 udelay(3);
97 }
98
set_str(u8 value)99 static void set_str(u8 value)
100 {
101 gpio_set_value(GPIO_STR, !!value);
102 udelay(3);
103 }
104
set_control(int line,int value)105 static inline void set_control(int line, int value)
106 {
107 if (value)
108 control_value |= (1 << line);
109 else
110 control_value &= ~(1 << line);
111 }
112
113
output_control(void)114 static void output_control(void)
115 {
116 int i;
117
118 gpio_direction_output(GPIO_SCL, 1);
119 gpio_direction_output(GPIO_SDA, 1);
120
121 for (i = 0; i < 8; i++) {
122 set_scl(0);
123 set_sda(control_value & (0x80 >> i)); /* MSB first */
124 set_scl(1); /* active edge */
125 }
126
127 set_str(1);
128 set_str(0);
129
130 set_scl(0);
131 set_sda(1); /* Be ready for START */
132 set_scl(1);
133 }
134
135
136 static void (*set_carrier_cb_tab[2])(void *pdev, int carrier);
137
hss_set_clock(int port,unsigned int clock_type)138 static int hss_set_clock(int port, unsigned int clock_type)
139 {
140 int ctrl_int = port ? CONTROL_HSS1_CLK_INT : CONTROL_HSS0_CLK_INT;
141
142 switch (clock_type) {
143 case CLOCK_DEFAULT:
144 case CLOCK_EXT:
145 set_control(ctrl_int, 0);
146 output_control();
147 return CLOCK_EXT;
148
149 case CLOCK_INT:
150 set_control(ctrl_int, 1);
151 output_control();
152 return CLOCK_INT;
153
154 default:
155 return -EINVAL;
156 }
157 }
158
hss_dcd_irq(int irq,void * pdev)159 static irqreturn_t hss_dcd_irq(int irq, void *pdev)
160 {
161 int port = (irq == IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N));
162 int i = gpio_get_value(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N);
163 set_carrier_cb_tab[port](pdev, !i);
164 return IRQ_HANDLED;
165 }
166
167
hss_open(int port,void * pdev,void (* set_carrier_cb)(void * pdev,int carrier))168 static int hss_open(int port, void *pdev,
169 void (*set_carrier_cb)(void *pdev, int carrier))
170 {
171 int i, irq;
172
173 if (!port)
174 irq = IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N);
175 else
176 irq = IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N);
177
178 i = gpio_get_value(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N);
179 set_carrier_cb(pdev, !i);
180
181 set_carrier_cb_tab[!!port] = set_carrier_cb;
182
183 if ((i = request_irq(irq, hss_dcd_irq, 0, "IXP4xx HSS", pdev)) != 0) {
184 printk(KERN_ERR "ixp4xx_hss: failed to request IRQ%i (%i)\n",
185 irq, i);
186 return i;
187 }
188
189 set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 0);
190 output_control();
191 gpio_set_value(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 0);
192 return 0;
193 }
194
hss_close(int port,void * pdev)195 static void hss_close(int port, void *pdev)
196 {
197 free_irq(port ? IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N) :
198 IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N), pdev);
199 set_carrier_cb_tab[!!port] = NULL; /* catch bugs */
200
201 set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 1);
202 output_control();
203 gpio_set_value(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 1);
204 }
205
206
207 /* Flash memory */
208 static struct flash_platform_data flash_data = {
209 .map_name = "cfi_probe",
210 .width = 2,
211 };
212
213 static struct resource flash_resource = {
214 .flags = IORESOURCE_MEM,
215 };
216
217 static struct platform_device device_flash = {
218 .name = "IXP4XX-Flash",
219 .id = 0,
220 .dev = { .platform_data = &flash_data },
221 .num_resources = 1,
222 .resource = &flash_resource,
223 };
224
225 /* IXP425 2 UART ports */
226 static struct resource uart_resources[] = {
227 {
228 .start = IXP4XX_UART1_BASE_PHYS,
229 .end = IXP4XX_UART1_BASE_PHYS + 0x0fff,
230 .flags = IORESOURCE_MEM,
231 },
232 {
233 .start = IXP4XX_UART2_BASE_PHYS,
234 .end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
235 .flags = IORESOURCE_MEM,
236 }
237 };
238
239 static struct plat_serial8250_port uart_data[] = {
240 {
241 .mapbase = IXP4XX_UART1_BASE_PHYS,
242 .membase = (char __iomem *)IXP4XX_UART1_BASE_VIRT +
243 REG_OFFSET,
244 .irq = IRQ_IXP4XX_UART1,
245 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
246 .iotype = UPIO_MEM,
247 .regshift = 2,
248 .uartclk = IXP4XX_UART_XTAL,
249 },
250 {
251 .mapbase = IXP4XX_UART2_BASE_PHYS,
252 .membase = (char __iomem *)IXP4XX_UART2_BASE_VIRT +
253 REG_OFFSET,
254 .irq = IRQ_IXP4XX_UART2,
255 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
256 .iotype = UPIO_MEM,
257 .regshift = 2,
258 .uartclk = IXP4XX_UART_XTAL,
259 },
260 { },
261 };
262
263 static struct platform_device device_uarts = {
264 .name = "serial8250",
265 .id = PLAT8250_DEV_PLATFORM,
266 .dev.platform_data = uart_data,
267 .num_resources = 2,
268 .resource = uart_resources,
269 };
270
271
272 /* Built-in 10/100 Ethernet MAC interfaces */
273 static struct eth_plat_info eth_plat[] = {
274 {
275 .phy = 0,
276 .rxq = 3,
277 .txreadyq = 32,
278 }, {
279 .phy = 1,
280 .rxq = 4,
281 .txreadyq = 33,
282 }
283 };
284
285 static struct platform_device device_eth_tab[] = {
286 {
287 .name = "ixp4xx_eth",
288 .id = IXP4XX_ETH_NPEB,
289 .dev.platform_data = eth_plat,
290 }, {
291 .name = "ixp4xx_eth",
292 .id = IXP4XX_ETH_NPEC,
293 .dev.platform_data = eth_plat + 1,
294 }
295 };
296
297
298 /* IXP425 2 synchronous serial ports */
299 static struct hss_plat_info hss_plat[] = {
300 {
301 .set_clock = hss_set_clock,
302 .open = hss_open,
303 .close = hss_close,
304 .txreadyq = 34,
305 }, {
306 .set_clock = hss_set_clock,
307 .open = hss_open,
308 .close = hss_close,
309 .txreadyq = 35,
310 }
311 };
312
313 static struct platform_device device_hss_tab[] = {
314 {
315 .name = "ixp4xx_hss",
316 .id = 0,
317 .dev.platform_data = hss_plat,
318 }, {
319 .name = "ixp4xx_hss",
320 .id = 1,
321 .dev.platform_data = hss_plat + 1,
322 }
323 };
324
325
326 static struct platform_device *device_tab[7] __initdata = {
327 &device_flash, /* index 0 */
328 };
329
flash_readb(u8 __iomem * flash,u32 addr)330 static inline u8 __init flash_readb(u8 __iomem *flash, u32 addr)
331 {
332 #ifdef __ARMEB__
333 return __raw_readb(flash + addr);
334 #else
335 return __raw_readb(flash + (addr ^ 3));
336 #endif
337 }
338
flash_readw(u8 __iomem * flash,u32 addr)339 static inline u16 __init flash_readw(u8 __iomem *flash, u32 addr)
340 {
341 #ifdef __ARMEB__
342 return __raw_readw(flash + addr);
343 #else
344 return __raw_readw(flash + (addr ^ 2));
345 #endif
346 }
347
gmlr_init(void)348 static void __init gmlr_init(void)
349 {
350 u8 __iomem *flash;
351 int i, devices = 1; /* flash */
352
353 ixp4xx_sys_init();
354
355 if ((flash = ioremap(IXP4XX_EXP_BUS_BASE_PHYS, 0x80)) == NULL)
356 printk(KERN_ERR "goramo-mlr: unable to access system"
357 " configuration data\n");
358 else {
359 system_rev = __raw_readl(flash + CFG_REV);
360 hw_bits = __raw_readl(flash + CFG_HW_BITS);
361
362 for (i = 0; i < ETH_ALEN; i++) {
363 eth_plat[0].hwaddr[i] =
364 flash_readb(flash, CFG_ETH0_ADDRESS + i);
365 eth_plat[1].hwaddr[i] =
366 flash_readb(flash, CFG_ETH1_ADDRESS + i);
367 }
368
369 __raw_writew(FLASH_CMD_READ_ID, flash);
370 system_serial_high = flash_readw(flash, FLASH_SER_OFF);
371 system_serial_high <<= 16;
372 system_serial_high |= flash_readw(flash, FLASH_SER_OFF + 2);
373 system_serial_low = flash_readw(flash, FLASH_SER_OFF + 4);
374 system_serial_low <<= 16;
375 system_serial_low |= flash_readw(flash, FLASH_SER_OFF + 6);
376 __raw_writew(FLASH_CMD_READ_ARRAY, flash);
377
378 iounmap(flash);
379 }
380
381 switch (hw_bits & (CFG_HW_HAS_UART0 | CFG_HW_HAS_UART1)) {
382 case CFG_HW_HAS_UART0:
383 memset(&uart_data[1], 0, sizeof(uart_data[1]));
384 device_uarts.num_resources = 1;
385 break;
386
387 case CFG_HW_HAS_UART1:
388 device_uarts.dev.platform_data = &uart_data[1];
389 device_uarts.resource = &uart_resources[1];
390 device_uarts.num_resources = 1;
391 break;
392 }
393 if (hw_bits & (CFG_HW_HAS_UART0 | CFG_HW_HAS_UART1))
394 device_tab[devices++] = &device_uarts; /* max index 1 */
395
396 if (hw_bits & CFG_HW_HAS_ETH0)
397 device_tab[devices++] = &device_eth_tab[0]; /* max index 2 */
398 if (hw_bits & CFG_HW_HAS_ETH1)
399 device_tab[devices++] = &device_eth_tab[1]; /* max index 3 */
400
401 if (hw_bits & CFG_HW_HAS_HSS0)
402 device_tab[devices++] = &device_hss_tab[0]; /* max index 4 */
403 if (hw_bits & CFG_HW_HAS_HSS1)
404 device_tab[devices++] = &device_hss_tab[1]; /* max index 5 */
405
406 gpio_request(GPIO_SCL, "SCL/clock");
407 gpio_request(GPIO_SDA, "SDA/data");
408 gpio_request(GPIO_STR, "strobe");
409 gpio_request(GPIO_HSS0_RTS_N, "HSS0 RTS");
410 gpio_request(GPIO_HSS1_RTS_N, "HSS1 RTS");
411 gpio_request(GPIO_HSS0_DCD_N, "HSS0 DCD");
412 gpio_request(GPIO_HSS1_DCD_N, "HSS1 DCD");
413
414 gpio_direction_output(GPIO_SCL, 1);
415 gpio_direction_output(GPIO_SDA, 1);
416 gpio_direction_output(GPIO_STR, 0);
417 gpio_direction_output(GPIO_HSS0_RTS_N, 1);
418 gpio_direction_output(GPIO_HSS1_RTS_N, 1);
419 gpio_direction_input(GPIO_HSS0_DCD_N);
420 gpio_direction_input(GPIO_HSS1_DCD_N);
421 irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N), IRQ_TYPE_EDGE_BOTH);
422 irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N), IRQ_TYPE_EDGE_BOTH);
423
424 set_control(CONTROL_HSS0_DTR_N, 1);
425 set_control(CONTROL_HSS1_DTR_N, 1);
426 set_control(CONTROL_EEPROM_WC_N, 1);
427 set_control(CONTROL_PCI_RESET_N, 1);
428 output_control();
429
430 msleep(1); /* Wait for PCI devices to initialize */
431
432 flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
433 flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
434
435 platform_add_devices(device_tab, devices);
436 }
437
438
439 #ifdef CONFIG_PCI
gmlr_pci_preinit(void)440 static void __init gmlr_pci_preinit(void)
441 {
442 irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHA), IRQ_TYPE_LEVEL_LOW);
443 irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHB), IRQ_TYPE_LEVEL_LOW);
444 irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_NEC), IRQ_TYPE_LEVEL_LOW);
445 irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_MPCI), IRQ_TYPE_LEVEL_LOW);
446 ixp4xx_pci_preinit();
447 }
448
gmlr_pci_postinit(void)449 static void __init gmlr_pci_postinit(void)
450 {
451 if ((hw_bits & CFG_HW_USB_PORTS) >= 2 &&
452 (hw_bits & CFG_HW_USB_PORTS) < 5) {
453 /* need to adjust number of USB ports on NEC chip */
454 u32 value, addr = BIT(32 - SLOT_NEC) | 0xE0;
455 if (!ixp4xx_pci_read(addr, NP_CMD_CONFIGREAD, &value)) {
456 value &= ~7;
457 value |= (hw_bits & CFG_HW_USB_PORTS);
458 ixp4xx_pci_write(addr, NP_CMD_CONFIGWRITE, value);
459 }
460 }
461 }
462
gmlr_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)463 static int __init gmlr_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
464 {
465 switch(slot) {
466 case SLOT_ETHA: return IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHA);
467 case SLOT_ETHB: return IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHB);
468 case SLOT_NEC: return IXP4XX_GPIO_IRQ(GPIO_IRQ_NEC);
469 default: return IXP4XX_GPIO_IRQ(GPIO_IRQ_MPCI);
470 }
471 }
472
473 static struct hw_pci gmlr_hw_pci __initdata = {
474 .nr_controllers = 1,
475 .ops = &ixp4xx_ops,
476 .preinit = gmlr_pci_preinit,
477 .postinit = gmlr_pci_postinit,
478 .setup = ixp4xx_setup,
479 .map_irq = gmlr_map_irq,
480 };
481
gmlr_pci_init(void)482 static int __init gmlr_pci_init(void)
483 {
484 if (machine_is_goramo_mlr() &&
485 (hw_bits & (CFG_HW_USB_PORTS | CFG_HW_HAS_PCI_SLOT)))
486 pci_common_init(&gmlr_hw_pci);
487 return 0;
488 }
489
490 subsys_initcall(gmlr_pci_init);
491 #endif /* CONFIG_PCI */
492
493
494 MACHINE_START(GORAMO_MLR, "MultiLink")
495 /* Maintainer: Krzysztof Halasa */
496 .map_io = ixp4xx_map_io,
497 .init_early = ixp4xx_init_early,
498 .init_irq = ixp4xx_init_irq,
499 .init_time = ixp4xx_timer_init,
500 .atag_offset = 0x100,
501 .init_machine = gmlr_init,
502 #if defined(CONFIG_PCI)
503 .dma_zone_size = SZ_64M,
504 #endif
505 .restart = ixp4xx_restart,
506 MACHINE_END
507