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 #include "irqs.h"
22
23 #define SLOT_ETHA 0x0B /* IDSEL = AD21 */
24 #define SLOT_ETHB 0x0C /* IDSEL = AD20 */
25 #define SLOT_MPCI 0x0D /* IDSEL = AD19 */
26 #define SLOT_NEC 0x0E /* IDSEL = AD18 */
27
28 /* GPIO lines */
29 #define GPIO_SCL 0
30 #define GPIO_SDA 1
31 #define GPIO_STR 2
32 #define GPIO_IRQ_NEC 3
33 #define GPIO_IRQ_ETHA 4
34 #define GPIO_IRQ_ETHB 5
35 #define GPIO_HSS0_DCD_N 6
36 #define GPIO_HSS1_DCD_N 7
37 #define GPIO_UART0_DCD 8
38 #define GPIO_UART1_DCD 9
39 #define GPIO_HSS0_CTS_N 10
40 #define GPIO_HSS1_CTS_N 11
41 #define GPIO_IRQ_MPCI 12
42 #define GPIO_HSS1_RTS_N 13
43 #define GPIO_HSS0_RTS_N 14
44 /* GPIO15 is not connected */
45
46 /* Control outputs from 74HC4094 */
47 #define CONTROL_HSS0_CLK_INT 0
48 #define CONTROL_HSS1_CLK_INT 1
49 #define CONTROL_HSS0_DTR_N 2
50 #define CONTROL_HSS1_DTR_N 3
51 #define CONTROL_EXT 4
52 #define CONTROL_AUTO_RESET 5
53 #define CONTROL_PCI_RESET_N 6
54 #define CONTROL_EEPROM_WC_N 7
55
56 /* offsets from start of flash ROM = 0x50000000 */
57 #define CFG_ETH0_ADDRESS 0x40 /* 6 bytes */
58 #define CFG_ETH1_ADDRESS 0x46 /* 6 bytes */
59 #define CFG_REV 0x4C /* u32 */
60 #define CFG_SDRAM_SIZE 0x50 /* u32 */
61 #define CFG_SDRAM_CONF 0x54 /* u32 */
62 #define CFG_SDRAM_MODE 0x58 /* u32 */
63 #define CFG_SDRAM_REFRESH 0x5C /* u32 */
64
65 #define CFG_HW_BITS 0x60 /* u32 */
66 #define CFG_HW_USB_PORTS 0x00000007 /* 0 = no NEC chip, 1-5 = ports # */
67 #define CFG_HW_HAS_PCI_SLOT 0x00000008
68 #define CFG_HW_HAS_ETH0 0x00000010
69 #define CFG_HW_HAS_ETH1 0x00000020
70 #define CFG_HW_HAS_HSS0 0x00000040
71 #define CFG_HW_HAS_HSS1 0x00000080
72 #define CFG_HW_HAS_UART0 0x00000100
73 #define CFG_HW_HAS_UART1 0x00000200
74 #define CFG_HW_HAS_EEPROM 0x00000400
75
76 #define FLASH_CMD_READ_ARRAY 0xFF
77 #define FLASH_CMD_READ_ID 0x90
78 #define FLASH_SER_OFF 0x102 /* 0x81 in 16-bit mode */
79
80 static u32 hw_bits = 0xFFFFFFFD; /* assume all hardware present */;
81 static u8 control_value;
82
83 /*
84 * FIXME: this is reimplementing I2C bit-bangining. Move this
85 * over to using driver/i2c/busses/i2c-gpio.c like all other boards
86 * and register proper I2C device(s) on the bus for this. (See
87 * other IXP4xx boards for examples.)
88 */
set_scl(u8 value)89 static void set_scl(u8 value)
90 {
91 gpio_set_value(GPIO_SCL, !!value);
92 udelay(3);
93 }
94
set_sda(u8 value)95 static void set_sda(u8 value)
96 {
97 gpio_set_value(GPIO_SDA, !!value);
98 udelay(3);
99 }
100
set_str(u8 value)101 static void set_str(u8 value)
102 {
103 gpio_set_value(GPIO_STR, !!value);
104 udelay(3);
105 }
106
set_control(int line,int value)107 static inline void set_control(int line, int value)
108 {
109 if (value)
110 control_value |= (1 << line);
111 else
112 control_value &= ~(1 << line);
113 }
114
115
output_control(void)116 static void output_control(void)
117 {
118 int i;
119
120 gpio_direction_output(GPIO_SCL, 1);
121 gpio_direction_output(GPIO_SDA, 1);
122
123 for (i = 0; i < 8; i++) {
124 set_scl(0);
125 set_sda(control_value & (0x80 >> i)); /* MSB first */
126 set_scl(1); /* active edge */
127 }
128
129 set_str(1);
130 set_str(0);
131
132 set_scl(0);
133 set_sda(1); /* Be ready for START */
134 set_scl(1);
135 }
136
137
138 static void (*set_carrier_cb_tab[2])(void *pdev, int carrier);
139
hss_set_clock(int port,unsigned int clock_type)140 static int hss_set_clock(int port, unsigned int clock_type)
141 {
142 int ctrl_int = port ? CONTROL_HSS1_CLK_INT : CONTROL_HSS0_CLK_INT;
143
144 switch (clock_type) {
145 case CLOCK_DEFAULT:
146 case CLOCK_EXT:
147 set_control(ctrl_int, 0);
148 output_control();
149 return CLOCK_EXT;
150
151 case CLOCK_INT:
152 set_control(ctrl_int, 1);
153 output_control();
154 return CLOCK_INT;
155
156 default:
157 return -EINVAL;
158 }
159 }
160
hss_dcd_irq(int irq,void * pdev)161 static irqreturn_t hss_dcd_irq(int irq, void *pdev)
162 {
163 int port = (irq == IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N));
164 int i = gpio_get_value(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N);
165 set_carrier_cb_tab[port](pdev, !i);
166 return IRQ_HANDLED;
167 }
168
169
hss_open(int port,void * pdev,void (* set_carrier_cb)(void * pdev,int carrier))170 static int hss_open(int port, void *pdev,
171 void (*set_carrier_cb)(void *pdev, int carrier))
172 {
173 int i, irq;
174
175 if (!port)
176 irq = IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N);
177 else
178 irq = IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N);
179
180 i = gpio_get_value(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N);
181 set_carrier_cb(pdev, !i);
182
183 set_carrier_cb_tab[!!port] = set_carrier_cb;
184
185 if ((i = request_irq(irq, hss_dcd_irq, 0, "IXP4xx HSS", pdev)) != 0) {
186 printk(KERN_ERR "ixp4xx_hss: failed to request IRQ%i (%i)\n",
187 irq, i);
188 return i;
189 }
190
191 set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 0);
192 output_control();
193 gpio_set_value(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 0);
194 return 0;
195 }
196
hss_close(int port,void * pdev)197 static void hss_close(int port, void *pdev)
198 {
199 free_irq(port ? IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N) :
200 IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N), pdev);
201 set_carrier_cb_tab[!!port] = NULL; /* catch bugs */
202
203 set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 1);
204 output_control();
205 gpio_set_value(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 1);
206 }
207
208
209 /* Flash memory */
210 static struct flash_platform_data flash_data = {
211 .map_name = "cfi_probe",
212 .width = 2,
213 };
214
215 static struct resource flash_resource = {
216 .flags = IORESOURCE_MEM,
217 };
218
219 static struct platform_device device_flash = {
220 .name = "IXP4XX-Flash",
221 .id = 0,
222 .dev = { .platform_data = &flash_data },
223 .num_resources = 1,
224 .resource = &flash_resource,
225 };
226
227 /* IXP425 2 UART ports */
228 static struct resource uart_resources[] = {
229 {
230 .start = IXP4XX_UART1_BASE_PHYS,
231 .end = IXP4XX_UART1_BASE_PHYS + 0x0fff,
232 .flags = IORESOURCE_MEM,
233 },
234 {
235 .start = IXP4XX_UART2_BASE_PHYS,
236 .end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
237 .flags = IORESOURCE_MEM,
238 }
239 };
240
241 static struct plat_serial8250_port uart_data[] = {
242 {
243 .mapbase = IXP4XX_UART1_BASE_PHYS,
244 .membase = (char __iomem *)IXP4XX_UART1_BASE_VIRT +
245 REG_OFFSET,
246 .irq = IRQ_IXP4XX_UART1,
247 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
248 .iotype = UPIO_MEM,
249 .regshift = 2,
250 .uartclk = IXP4XX_UART_XTAL,
251 },
252 {
253 .mapbase = IXP4XX_UART2_BASE_PHYS,
254 .membase = (char __iomem *)IXP4XX_UART2_BASE_VIRT +
255 REG_OFFSET,
256 .irq = IRQ_IXP4XX_UART2,
257 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
258 .iotype = UPIO_MEM,
259 .regshift = 2,
260 .uartclk = IXP4XX_UART_XTAL,
261 },
262 { },
263 };
264
265 static struct platform_device device_uarts = {
266 .name = "serial8250",
267 .id = PLAT8250_DEV_PLATFORM,
268 .dev.platform_data = uart_data,
269 .num_resources = 2,
270 .resource = uart_resources,
271 };
272
273
274 /* Built-in 10/100 Ethernet MAC interfaces */
275 static struct eth_plat_info eth_plat[] = {
276 {
277 .phy = 0,
278 .rxq = 3,
279 .txreadyq = 32,
280 }, {
281 .phy = 1,
282 .rxq = 4,
283 .txreadyq = 33,
284 }
285 };
286
287 static struct platform_device device_eth_tab[] = {
288 {
289 .name = "ixp4xx_eth",
290 .id = IXP4XX_ETH_NPEB,
291 .dev.platform_data = eth_plat,
292 }, {
293 .name = "ixp4xx_eth",
294 .id = IXP4XX_ETH_NPEC,
295 .dev.platform_data = eth_plat + 1,
296 }
297 };
298
299
300 /* IXP425 2 synchronous serial ports */
301 static struct hss_plat_info hss_plat[] = {
302 {
303 .set_clock = hss_set_clock,
304 .open = hss_open,
305 .close = hss_close,
306 .txreadyq = 34,
307 }, {
308 .set_clock = hss_set_clock,
309 .open = hss_open,
310 .close = hss_close,
311 .txreadyq = 35,
312 }
313 };
314
315 static struct platform_device device_hss_tab[] = {
316 {
317 .name = "ixp4xx_hss",
318 .id = 0,
319 .dev.platform_data = hss_plat,
320 }, {
321 .name = "ixp4xx_hss",
322 .id = 1,
323 .dev.platform_data = hss_plat + 1,
324 }
325 };
326
327
328 static struct platform_device *device_tab[7] __initdata = {
329 &device_flash, /* index 0 */
330 };
331
flash_readb(u8 __iomem * flash,u32 addr)332 static inline u8 __init flash_readb(u8 __iomem *flash, u32 addr)
333 {
334 #ifdef __ARMEB__
335 return __raw_readb(flash + addr);
336 #else
337 return __raw_readb(flash + (addr ^ 3));
338 #endif
339 }
340
flash_readw(u8 __iomem * flash,u32 addr)341 static inline u16 __init flash_readw(u8 __iomem *flash, u32 addr)
342 {
343 #ifdef __ARMEB__
344 return __raw_readw(flash + addr);
345 #else
346 return __raw_readw(flash + (addr ^ 2));
347 #endif
348 }
349
gmlr_init(void)350 static void __init gmlr_init(void)
351 {
352 u8 __iomem *flash;
353 int i, devices = 1; /* flash */
354
355 ixp4xx_sys_init();
356
357 if ((flash = ioremap(IXP4XX_EXP_BUS_BASE_PHYS, 0x80)) == NULL)
358 printk(KERN_ERR "goramo-mlr: unable to access system"
359 " configuration data\n");
360 else {
361 system_rev = __raw_readl(flash + CFG_REV);
362 hw_bits = __raw_readl(flash + CFG_HW_BITS);
363
364 for (i = 0; i < ETH_ALEN; i++) {
365 eth_plat[0].hwaddr[i] =
366 flash_readb(flash, CFG_ETH0_ADDRESS + i);
367 eth_plat[1].hwaddr[i] =
368 flash_readb(flash, CFG_ETH1_ADDRESS + i);
369 }
370
371 __raw_writew(FLASH_CMD_READ_ID, flash);
372 system_serial_high = flash_readw(flash, FLASH_SER_OFF);
373 system_serial_high <<= 16;
374 system_serial_high |= flash_readw(flash, FLASH_SER_OFF + 2);
375 system_serial_low = flash_readw(flash, FLASH_SER_OFF + 4);
376 system_serial_low <<= 16;
377 system_serial_low |= flash_readw(flash, FLASH_SER_OFF + 6);
378 __raw_writew(FLASH_CMD_READ_ARRAY, flash);
379
380 iounmap(flash);
381 }
382
383 switch (hw_bits & (CFG_HW_HAS_UART0 | CFG_HW_HAS_UART1)) {
384 case CFG_HW_HAS_UART0:
385 memset(&uart_data[1], 0, sizeof(uart_data[1]));
386 device_uarts.num_resources = 1;
387 break;
388
389 case CFG_HW_HAS_UART1:
390 device_uarts.dev.platform_data = &uart_data[1];
391 device_uarts.resource = &uart_resources[1];
392 device_uarts.num_resources = 1;
393 break;
394 }
395 if (hw_bits & (CFG_HW_HAS_UART0 | CFG_HW_HAS_UART1))
396 device_tab[devices++] = &device_uarts; /* max index 1 */
397
398 if (hw_bits & CFG_HW_HAS_ETH0)
399 device_tab[devices++] = &device_eth_tab[0]; /* max index 2 */
400 if (hw_bits & CFG_HW_HAS_ETH1)
401 device_tab[devices++] = &device_eth_tab[1]; /* max index 3 */
402
403 if (hw_bits & CFG_HW_HAS_HSS0)
404 device_tab[devices++] = &device_hss_tab[0]; /* max index 4 */
405 if (hw_bits & CFG_HW_HAS_HSS1)
406 device_tab[devices++] = &device_hss_tab[1]; /* max index 5 */
407
408 gpio_request(GPIO_SCL, "SCL/clock");
409 gpio_request(GPIO_SDA, "SDA/data");
410 gpio_request(GPIO_STR, "strobe");
411 gpio_request(GPIO_HSS0_RTS_N, "HSS0 RTS");
412 gpio_request(GPIO_HSS1_RTS_N, "HSS1 RTS");
413 gpio_request(GPIO_HSS0_DCD_N, "HSS0 DCD");
414 gpio_request(GPIO_HSS1_DCD_N, "HSS1 DCD");
415
416 gpio_direction_output(GPIO_SCL, 1);
417 gpio_direction_output(GPIO_SDA, 1);
418 gpio_direction_output(GPIO_STR, 0);
419 gpio_direction_output(GPIO_HSS0_RTS_N, 1);
420 gpio_direction_output(GPIO_HSS1_RTS_N, 1);
421 gpio_direction_input(GPIO_HSS0_DCD_N);
422 gpio_direction_input(GPIO_HSS1_DCD_N);
423 irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N), IRQ_TYPE_EDGE_BOTH);
424 irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N), IRQ_TYPE_EDGE_BOTH);
425
426 set_control(CONTROL_HSS0_DTR_N, 1);
427 set_control(CONTROL_HSS1_DTR_N, 1);
428 set_control(CONTROL_EEPROM_WC_N, 1);
429 set_control(CONTROL_PCI_RESET_N, 1);
430 output_control();
431
432 msleep(1); /* Wait for PCI devices to initialize */
433
434 flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
435 flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
436
437 platform_add_devices(device_tab, devices);
438 }
439
440
441 #ifdef CONFIG_PCI
gmlr_pci_preinit(void)442 static void __init gmlr_pci_preinit(void)
443 {
444 irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHA), IRQ_TYPE_LEVEL_LOW);
445 irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHB), IRQ_TYPE_LEVEL_LOW);
446 irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_NEC), IRQ_TYPE_LEVEL_LOW);
447 irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_MPCI), IRQ_TYPE_LEVEL_LOW);
448 ixp4xx_pci_preinit();
449 }
450
gmlr_pci_postinit(void)451 static void __init gmlr_pci_postinit(void)
452 {
453 if ((hw_bits & CFG_HW_USB_PORTS) >= 2 &&
454 (hw_bits & CFG_HW_USB_PORTS) < 5) {
455 /* need to adjust number of USB ports on NEC chip */
456 u32 value, addr = BIT(32 - SLOT_NEC) | 0xE0;
457 if (!ixp4xx_pci_read(addr, NP_CMD_CONFIGREAD, &value)) {
458 value &= ~7;
459 value |= (hw_bits & CFG_HW_USB_PORTS);
460 ixp4xx_pci_write(addr, NP_CMD_CONFIGWRITE, value);
461 }
462 }
463 }
464
gmlr_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)465 static int __init gmlr_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
466 {
467 switch(slot) {
468 case SLOT_ETHA: return IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHA);
469 case SLOT_ETHB: return IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHB);
470 case SLOT_NEC: return IXP4XX_GPIO_IRQ(GPIO_IRQ_NEC);
471 default: return IXP4XX_GPIO_IRQ(GPIO_IRQ_MPCI);
472 }
473 }
474
475 static struct hw_pci gmlr_hw_pci __initdata = {
476 .nr_controllers = 1,
477 .ops = &ixp4xx_ops,
478 .preinit = gmlr_pci_preinit,
479 .postinit = gmlr_pci_postinit,
480 .setup = ixp4xx_setup,
481 .map_irq = gmlr_map_irq,
482 };
483
gmlr_pci_init(void)484 static int __init gmlr_pci_init(void)
485 {
486 if (machine_is_goramo_mlr() &&
487 (hw_bits & (CFG_HW_USB_PORTS | CFG_HW_HAS_PCI_SLOT)))
488 pci_common_init(&gmlr_hw_pci);
489 return 0;
490 }
491
492 subsys_initcall(gmlr_pci_init);
493 #endif /* CONFIG_PCI */
494
495
496 MACHINE_START(GORAMO_MLR, "MultiLink")
497 /* Maintainer: Krzysztof Halasa */
498 .map_io = ixp4xx_map_io,
499 .init_early = ixp4xx_init_early,
500 .init_irq = ixp4xx_init_irq,
501 .init_time = ixp4xx_timer_init,
502 .atag_offset = 0x100,
503 .init_machine = gmlr_init,
504 #if defined(CONFIG_PCI)
505 .dma_zone_size = SZ_64M,
506 #endif
507 .restart = ixp4xx_restart,
508 MACHINE_END
509
