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 #include <linux/gpio.h>
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/mach/arch.h>
24 #include <asm/mach/pci.h>
25 #include <mach/orion5x.h>
26 #include "common.h"
27 #include "mpp.h"
28
29 /*****************************************************************************
30 * Terastation Pro 2/Live Info
31 ****************************************************************************/
32
33 /*
34 * Terastation Pro 2 hardware :
35 * - Marvell 88F5281-D0
36 * - Marvell 88SX6042 SATA controller (PCI)
37 * - Marvell 88E1118 Gigabit Ethernet PHY
38 * - 256KB NOR flash
39 * - 128MB of DDR RAM
40 * - PCIe port (not equipped)
41 */
42
43 /*
44 * 256K NOR flash Device bus boot chip select
45 */
46
47 #define TSP2_NOR_BOOT_BASE 0xf4000000
48 #define TSP2_NOR_BOOT_SIZE SZ_256K
49
50 /*****************************************************************************
51 * 256KB NOR Flash on BOOT Device
52 ****************************************************************************/
53
54 static struct physmap_flash_data tsp2_nor_flash_data = {
55 .width = 1,
56 };
57
58 static struct resource tsp2_nor_flash_resource = {
59 .flags = IORESOURCE_MEM,
60 .start = TSP2_NOR_BOOT_BASE,
61 .end = TSP2_NOR_BOOT_BASE + TSP2_NOR_BOOT_SIZE - 1,
62 };
63
64 static struct platform_device tsp2_nor_flash = {
65 .name = "physmap-flash",
66 .id = 0,
67 .dev = {
68 .platform_data = &tsp2_nor_flash_data,
69 },
70 .num_resources = 1,
71 .resource = &tsp2_nor_flash_resource,
72 };
73
74 /*****************************************************************************
75 * PCI
76 ****************************************************************************/
77 #define TSP2_PCI_SLOT0_OFFS 7
78 #define TSP2_PCI_SLOT0_IRQ_PIN 11
79
tsp2_pci_preinit(void)80 static void __init tsp2_pci_preinit(void)
81 {
82 int pin;
83
84 /*
85 * Configure PCI GPIO IRQ pins
86 */
87 pin = TSP2_PCI_SLOT0_IRQ_PIN;
88 if (gpio_request(pin, "PCI Int1") == 0) {
89 if (gpio_direction_input(pin) == 0) {
90 irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
91 } else {
92 printk(KERN_ERR "tsp2_pci_preinit failed "
93 "to set_irq_type pin %d\n", pin);
94 gpio_free(pin);
95 }
96 } else {
97 printk(KERN_ERR "tsp2_pci_preinit failed to "
98 "gpio_request %d\n", pin);
99 }
100 }
101
tsp2_pci_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)102 static int __init tsp2_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
103 {
104 int irq;
105
106 /*
107 * Check for devices with hard-wired IRQs.
108 */
109 irq = orion5x_pci_map_irq(dev, slot, pin);
110 if (irq != -1)
111 return irq;
112
113 /*
114 * PCI IRQs are connected via GPIOs.
115 */
116 if (slot == TSP2_PCI_SLOT0_OFFS)
117 return gpio_to_irq(TSP2_PCI_SLOT0_IRQ_PIN);
118
119 return -1;
120 }
121
122 static struct hw_pci tsp2_pci __initdata = {
123 .nr_controllers = 2,
124 .preinit = tsp2_pci_preinit,
125 .setup = orion5x_pci_sys_setup,
126 .scan = orion5x_pci_sys_scan_bus,
127 .map_irq = tsp2_pci_map_irq,
128 };
129
tsp2_pci_init(void)130 static int __init tsp2_pci_init(void)
131 {
132 if (machine_is_terastation_pro2())
133 pci_common_init(&tsp2_pci);
134
135 return 0;
136 }
137
138 subsys_initcall(tsp2_pci_init);
139
140 /*****************************************************************************
141 * Ethernet
142 ****************************************************************************/
143
144 static struct mv643xx_eth_platform_data tsp2_eth_data = {
145 .phy_addr = 0,
146 };
147
148 /*****************************************************************************
149 * RTC 5C372a on I2C bus
150 ****************************************************************************/
151
152 #define TSP2_RTC_GPIO 9
153
154 static struct i2c_board_info __initdata tsp2_i2c_rtc = {
155 I2C_BOARD_INFO("rs5c372a", 0x32),
156 };
157
158 /*****************************************************************************
159 * Terastation Pro II specific power off method via UART1-attached
160 * microcontroller
161 ****************************************************************************/
162
163 #define UART1_REG(x) (UART1_VIRT_BASE + ((UART_##x) << 2))
164
tsp2_miconread(unsigned char * buf,int count)165 static int tsp2_miconread(unsigned char *buf, int count)
166 {
167 int i;
168 int timeout;
169
170 for (i = 0; i < count; i++) {
171 timeout = 10;
172
173 while (!(readl(UART1_REG(LSR)) & UART_LSR_DR)) {
174 if (--timeout == 0)
175 break;
176 udelay(1000);
177 }
178
179 if (timeout == 0)
180 break;
181 buf[i] = readl(UART1_REG(RX));
182 }
183
184 /* return read bytes */
185 return i;
186 }
187
tsp2_miconwrite(const unsigned char * buf,int count)188 static int tsp2_miconwrite(const unsigned char *buf, int count)
189 {
190 int i = 0;
191
192 while (count--) {
193 while (!(readl(UART1_REG(LSR)) & UART_LSR_THRE))
194 barrier();
195 writel(buf[i++], UART1_REG(TX));
196 }
197
198 return 0;
199 }
200
tsp2_miconsend(const unsigned char * data,int count)201 static int tsp2_miconsend(const unsigned char *data, int count)
202 {
203 int i;
204 unsigned char checksum = 0;
205 unsigned char recv_buf[40];
206 unsigned char send_buf[40];
207 unsigned char correct_ack[3];
208 int retry = 2;
209
210 /* Generate checksum */
211 for (i = 0; i < count; i++)
212 checksum -= data[i];
213
214 do {
215 /* Send data */
216 tsp2_miconwrite(data, count);
217
218 /* send checksum */
219 tsp2_miconwrite(&checksum, 1);
220
221 if (tsp2_miconread(recv_buf, sizeof(recv_buf)) <= 3) {
222 printk(KERN_ERR ">%s: receive failed.\n", __func__);
223
224 /* send preamble to clear the receive buffer */
225 memset(&send_buf, 0xff, sizeof(send_buf));
226 tsp2_miconwrite(send_buf, sizeof(send_buf));
227
228 /* make dummy reads */
229 mdelay(100);
230 tsp2_miconread(recv_buf, sizeof(recv_buf));
231 } else {
232 /* Generate expected ack */
233 correct_ack[0] = 0x01;
234 correct_ack[1] = data[1];
235 correct_ack[2] = 0x00;
236
237 /* checksum Check */
238 if ((recv_buf[0] + recv_buf[1] + recv_buf[2] +
239 recv_buf[3]) & 0xFF) {
240 printk(KERN_ERR ">%s: Checksum Error : "
241 "Received data[%02x, %02x, %02x, %02x]"
242 "\n", __func__, recv_buf[0],
243 recv_buf[1], recv_buf[2], recv_buf[3]);
244 } else {
245 /* Check Received Data */
246 if (correct_ack[0] == recv_buf[0] &&
247 correct_ack[1] == recv_buf[1] &&
248 correct_ack[2] == recv_buf[2]) {
249 /* Interval for next command */
250 mdelay(10);
251
252 /* Receive ACK */
253 return 0;
254 }
255 }
256 /* Received NAK or illegal Data */
257 printk(KERN_ERR ">%s: Error : NAK or Illegal Data "
258 "Received\n", __func__);
259 }
260 } while (retry--);
261
262 /* Interval for next command */
263 mdelay(10);
264
265 return -1;
266 }
267
tsp2_power_off(void)268 static void tsp2_power_off(void)
269 {
270 const unsigned char watchdogkill[] = {0x01, 0x35, 0x00};
271 const unsigned char shutdownwait[] = {0x00, 0x0c};
272 const unsigned char poweroff[] = {0x00, 0x06};
273 /* 38400 baud divisor */
274 const unsigned divisor = ((orion5x_tclk + (8 * 38400)) / (16 * 38400));
275
276 pr_info("%s: triggering power-off...\n", __func__);
277
278 /* hijack uart1 and reset into sane state (38400,8n1,even parity) */
279 writel(0x83, UART1_REG(LCR));
280 writel(divisor & 0xff, UART1_REG(DLL));
281 writel((divisor >> 8) & 0xff, UART1_REG(DLM));
282 writel(0x1b, UART1_REG(LCR));
283 writel(0x00, UART1_REG(IER));
284 writel(0x07, UART1_REG(FCR));
285 writel(0x00, UART1_REG(MCR));
286
287 /* Send the commands to shutdown the Terastation Pro II */
288 tsp2_miconsend(watchdogkill, sizeof(watchdogkill)) ;
289 tsp2_miconsend(shutdownwait, sizeof(shutdownwait)) ;
290 tsp2_miconsend(poweroff, sizeof(poweroff));
291 }
292
293 /*****************************************************************************
294 * General Setup
295 ****************************************************************************/
296 static unsigned int tsp2_mpp_modes[] __initdata = {
297 MPP0_PCIE_RST_OUTn,
298 MPP1_UNUSED,
299 MPP2_UNUSED,
300 MPP3_UNUSED,
301 MPP4_NAND, /* BOOT NAND Flash REn */
302 MPP5_NAND, /* BOOT NAND Flash WEn */
303 MPP6_NAND, /* BOOT NAND Flash HREn[0] */
304 MPP7_NAND, /* BOOT NAND Flash WEn[0] */
305 MPP8_GPIO, /* MICON int */
306 MPP9_GPIO, /* RTC int */
307 MPP10_UNUSED,
308 MPP11_GPIO, /* PCI Int A */
309 MPP12_UNUSED,
310 MPP13_GPIO, /* UPS on UART0 enable */
311 MPP14_GPIO, /* UPS low battery detection */
312 MPP15_UNUSED,
313 MPP16_UART, /* UART1 RXD */
314 MPP17_UART, /* UART1 TXD */
315 MPP18_UART, /* UART1 CTSn */
316 MPP19_UART, /* UART1 RTSn */
317 0,
318 };
319
tsp2_init(void)320 static void __init tsp2_init(void)
321 {
322 /*
323 * Setup basic Orion functions. Need to be called early.
324 */
325 orion5x_init();
326
327 orion5x_mpp_conf(tsp2_mpp_modes);
328
329 /*
330 * Configure peripherals.
331 */
332 mvebu_mbus_add_window_by_id(ORION_MBUS_DEVBUS_BOOT_TARGET,
333 ORION_MBUS_DEVBUS_BOOT_ATTR,
334 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_warn("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 .atag_offset = 0x100,
362 .init_machine = tsp2_init,
363 .map_io = orion5x_map_io,
364 .init_early = orion5x_init_early,
365 .init_irq = orion5x_init_irq,
366 .init_time = orion5x_timer_init,
367 .fixup = tag_fixup_mem32,
368 .restart = orion5x_restart,
369 MACHINE_END
370