1 /*
2 * Buffalo Terastation Pro II/Live Board Setup
3 *
4 * Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/platform_device.h>
15 #include <linux/pci.h>
16 #include <linux/irq.h>
17 #include <linux/delay.h>
18 #include <linux/mtd/physmap.h>
19 #include <linux/mv643xx_eth.h>
20 #include <linux/i2c.h>
21 #include <linux/serial_reg.h>
22 #include <asm/mach-types.h>
23 #include <asm/gpio.h>
24 #include <asm/mach/arch.h>
25 #include <asm/mach/pci.h>
26 #include <mach/orion5x.h>
27 #include "common.h"
28 #include "mpp.h"
29
30 /*****************************************************************************
31 * Terastation Pro 2/Live Info
32 ****************************************************************************/
33
34 /*
35 * Terastation Pro 2 hardware :
36 * - Marvell 88F5281-D0
37 * - Marvell 88SX6042 SATA controller (PCI)
38 * - Marvell 88E1118 Gigabit Ethernet PHY
39 * - 256KB NOR flash
40 * - 128MB of DDR RAM
41 * - PCIe port (not equipped)
42 */
43
44 /*
45 * 256K NOR flash Device bus boot chip select
46 */
47
48 #define TSP2_NOR_BOOT_BASE 0xf4000000
49 #define TSP2_NOR_BOOT_SIZE SZ_256K
50
51 /*****************************************************************************
52 * 256KB NOR Flash on BOOT Device
53 ****************************************************************************/
54
55 static struct physmap_flash_data tsp2_nor_flash_data = {
56 .width = 1,
57 };
58
59 static struct resource tsp2_nor_flash_resource = {
60 .flags = IORESOURCE_MEM,
61 .start = TSP2_NOR_BOOT_BASE,
62 .end = TSP2_NOR_BOOT_BASE + TSP2_NOR_BOOT_SIZE - 1,
63 };
64
65 static struct platform_device tsp2_nor_flash = {
66 .name = "physmap-flash",
67 .id = 0,
68 .dev = {
69 .platform_data = &tsp2_nor_flash_data,
70 },
71 .num_resources = 1,
72 .resource = &tsp2_nor_flash_resource,
73 };
74
75 /*****************************************************************************
76 * PCI
77 ****************************************************************************/
78 #define TSP2_PCI_SLOT0_OFFS 7
79 #define TSP2_PCI_SLOT0_IRQ_PIN 11
80
81 void __init tsp2_pci_preinit(void)
82 {
83 int pin;
84
85 /*
86 * Configure PCI GPIO IRQ pins
87 */
88 pin = TSP2_PCI_SLOT0_IRQ_PIN;
89 if (gpio_request(pin, "PCI Int1") == 0) {
90 if (gpio_direction_input(pin) == 0) {
91 set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
92 } else {
93 printk(KERN_ERR "tsp2_pci_preinit failed "
94 "to set_irq_type pin %d\n", pin);
95 gpio_free(pin);
96 }
97 } else {
98 printk(KERN_ERR "tsp2_pci_preinit failed to "
99 "gpio_request %d\n", pin);
100 }
101 }
102
103 static int __init tsp2_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
104 {
105 int irq;
106
107 /*
108 * Check for devices with hard-wired IRQs.
109 */
110 irq = orion5x_pci_map_irq(dev, slot, pin);
111 if (irq != -1)
112 return irq;
113
114 /*
115 * PCI IRQs are connected via GPIOs.
116 */
117 if (slot == TSP2_PCI_SLOT0_OFFS)
118 return gpio_to_irq(TSP2_PCI_SLOT0_IRQ_PIN);
119
120 return -1;
121 }
122
123 static struct hw_pci tsp2_pci __initdata = {
124 .nr_controllers = 2,
125 .preinit = tsp2_pci_preinit,
126 .swizzle = pci_std_swizzle,
127 .setup = orion5x_pci_sys_setup,
128 .scan = orion5x_pci_sys_scan_bus,
129 .map_irq = tsp2_pci_map_irq,
130 };
131
132 static int __init tsp2_pci_init(void)
133 {
134 if (machine_is_terastation_pro2())
135 pci_common_init(&tsp2_pci);
136
137 return 0;
138 }
139
140 subsys_initcall(tsp2_pci_init);
141
142 /*****************************************************************************
143 * Ethernet
144 ****************************************************************************/
145
146 static struct mv643xx_eth_platform_data tsp2_eth_data = {
147 .phy_addr = 0,
148 };
149
150 /*****************************************************************************
151 * RTC 5C372a on I2C bus
152 ****************************************************************************/
153
154 #define TSP2_RTC_GPIO 9
155
156 static struct i2c_board_info __initdata tsp2_i2c_rtc = {
157 I2C_BOARD_INFO("rs5c372a", 0x32),
158 };
159
160 /*****************************************************************************
161 * Terastation Pro II specific power off method via UART1-attached
162 * microcontroller
163 ****************************************************************************/
164
165 #define UART1_REG(x) (UART1_VIRT_BASE + ((UART_##x) << 2))
166
167 static int tsp2_miconread(unsigned char *buf, int count)
168 {
169 int i;
170 int timeout;
171
172 for (i = 0; i < count; i++) {
173 timeout = 10;
174
175 while (!(readl(UART1_REG(LSR)) & UART_LSR_DR)) {
176 if (--timeout == 0)
177 break;
178 udelay(1000);
179 }
180
181 if (timeout == 0)
182 break;
183 buf[i] = readl(UART1_REG(RX));
184 }
185
186 /* return read bytes */
187 return i;
188 }
189
190 static int tsp2_miconwrite(const unsigned char *buf, int count)
191 {
192 int i = 0;
193
194 while (count--) {
195 while (!(readl(UART1_REG(LSR)) & UART_LSR_THRE))
196 barrier();
197 writel(buf[i++], UART1_REG(TX));
198 }
199
200 return 0;
201 }
202
203 static int tsp2_miconsend(const unsigned char *data, int count)
204 {
205 int i;
206 unsigned char checksum = 0;
207 unsigned char recv_buf[40];
208 unsigned char send_buf[40];
209 unsigned char correct_ack[3];
210 int retry = 2;
211
212 /* Generate checksum */
213 for (i = 0; i < count; i++)
214 checksum -= data[i];
215
216 do {
217 /* Send data */
218 tsp2_miconwrite(data, count);
219
220 /* send checksum */
221 tsp2_miconwrite(&checksum, 1);
222
223 if (tsp2_miconread(recv_buf, sizeof(recv_buf)) <= 3) {
224 printk(KERN_ERR ">%s: receive failed.\n", __func__);
225
226 /* send preamble to clear the receive buffer */
227 memset(&send_buf, 0xff, sizeof(send_buf));
228 tsp2_miconwrite(send_buf, sizeof(send_buf));
229
230 /* make dummy reads */
231 mdelay(100);
232 tsp2_miconread(recv_buf, sizeof(recv_buf));
233 } else {
234 /* Generate expected ack */
235 correct_ack[0] = 0x01;
236 correct_ack[1] = data[1];
237 correct_ack[2] = 0x00;
238
239 /* checksum Check */
240 if ((recv_buf[0] + recv_buf[1] + recv_buf[2] +
241 recv_buf[3]) & 0xFF) {
242 printk(KERN_ERR ">%s: Checksum Error : "
243 "Received data[%02x, %02x, %02x, %02x]"
244 "\n", __func__, recv_buf[0],
245 recv_buf[1], recv_buf[2], recv_buf[3]);
246 } else {
247 /* Check Received Data */
248 if (correct_ack[0] == recv_buf[0] &&
249 correct_ack[1] == recv_buf[1] &&
250 correct_ack[2] == recv_buf[2]) {
251 /* Interval for next command */
252 mdelay(10);
253
254 /* Receive ACK */
255 return 0;
256 }
257 }
258 /* Received NAK or illegal Data */
259 printk(KERN_ERR ">%s: Error : NAK or Illegal Data "
260 "Received\n", __func__);
261 }
262 } while (retry--);
263
264 /* Interval for next command */
265 mdelay(10);
266
267 return -1;
268 }
269
270 static void tsp2_power_off(void)
271 {
272 const unsigned char watchdogkill[] = {0x01, 0x35, 0x00};
273 const unsigned char shutdownwait[] = {0x00, 0x0c};
274 const unsigned char poweroff[] = {0x00, 0x06};
275 /* 38400 baud divisor */
276 const unsigned divisor = ((orion5x_tclk + (8 * 38400)) / (16 * 38400));
277
278 pr_info("%s: triggering power-off...\n", __func__);
279
280 /* hijack uart1 and reset into sane state (38400,8n1,even parity) */
281 writel(0x83, UART1_REG(LCR));
282 writel(divisor & 0xff, UART1_REG(DLL));
283 writel((divisor >> 8) & 0xff, UART1_REG(DLM));
284 writel(0x1b, UART1_REG(LCR));
285 writel(0x00, UART1_REG(IER));
286 writel(0x07, UART1_REG(FCR));
287 writel(0x00, UART1_REG(MCR));
288
289 /* Send the commands to shutdown the Terastation Pro II */
290 tsp2_miconsend(watchdogkill, sizeof(watchdogkill)) ;
291 tsp2_miconsend(shutdownwait, sizeof(shutdownwait)) ;
292 tsp2_miconsend(poweroff, sizeof(poweroff));
293 }
294
295 /*****************************************************************************
296 * General Setup
297 ****************************************************************************/
298 static struct orion5x_mpp_mode tsp2_mpp_modes[] __initdata = {
299 { 0, MPP_PCIE_RST_OUTn },
300 { 1, MPP_UNUSED },
301 { 2, MPP_UNUSED },
302 { 3, MPP_UNUSED },
303 { 4, MPP_NAND }, /* BOOT NAND Flash REn */
304 { 5, MPP_NAND }, /* BOOT NAND Flash WEn */
305 { 6, MPP_NAND }, /* BOOT NAND Flash HREn[0] */
306 { 7, MPP_NAND }, /* BOOT NAND Flash WEn[0] */
307 { 8, MPP_GPIO }, /* MICON int */
308 { 9, MPP_GPIO }, /* RTC int */
309 { 10, MPP_UNUSED },
310 { 11, MPP_GPIO }, /* PCI Int A */
311 { 12, MPP_UNUSED },
312 { 13, MPP_GPIO }, /* UPS on UART0 enable */
313 { 14, MPP_GPIO }, /* UPS low battery detection */
314 { 15, MPP_UNUSED },
315 { 16, MPP_UART }, /* UART1 RXD */
316 { 17, MPP_UART }, /* UART1 TXD */
317 { 18, MPP_UART }, /* UART1 CTSn */
318 { 19, MPP_UART }, /* UART1 RTSn */
319 { -1 },
320 };
321
322 static void __init tsp2_init(void)
323 {
324 /*
325 * Setup basic Orion functions. Need to be called early.
326 */
327 orion5x_init();
328
329 orion5x_mpp_conf(tsp2_mpp_modes);
330
331 /*
332 * Configure peripherals.
333 */
334 orion5x_setup_dev_boot_win(TSP2_NOR_BOOT_BASE,
335 TSP2_NOR_BOOT_SIZE);
336 platform_device_register(&tsp2_nor_flash);
337
338 orion5x_ehci0_init();
339 orion5x_eth_init(&tsp2_eth_data);
340 orion5x_i2c_init();
341 orion5x_uart0_init();
342 orion5x_uart1_init();
343
344 /* Get RTC IRQ and register the chip */
345 if (gpio_request(TSP2_RTC_GPIO, "rtc") == 0) {
346 if (gpio_direction_input(TSP2_RTC_GPIO) == 0)
347 tsp2_i2c_rtc.irq = gpio_to_irq(TSP2_RTC_GPIO);
348 else
349 gpio_free(TSP2_RTC_GPIO);
350 }
351 if (tsp2_i2c_rtc.irq == 0)
352 pr_warning("tsp2_init: failed to get RTC IRQ\n");
353 i2c_register_board_info(0, &tsp2_i2c_rtc, 1);
354
355 /* register Terastation Pro II specific power-off method */
356 pm_power_off = tsp2_power_off;
357 }
358
359 MACHINE_START(TERASTATION_PRO2, "Buffalo Terastation Pro II/Live")
360 /* Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com> */
361 .phys_io = ORION5X_REGS_PHYS_BASE,
362 .io_pg_offst = ((ORION5X_REGS_VIRT_BASE) >> 18) & 0xFFFC,
363 .boot_params = 0x00000100,
364 .init_machine = tsp2_init,
365 .map_io = orion5x_map_io,
366 .init_irq = orion5x_init_irq,
367 .timer = &orion5x_timer,
368 .fixup = tag_fixup_mem32,
369 MACHINE_END
370
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