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terastation_pro2-setup.c
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1 /*
2  * Buffalo Terastation Pro II/Live Board Setup
3  *
4  * Maintainer: Sylver Bruneau <[email protected]>
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 
80 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 
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 
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 
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 
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 
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 
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 
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  orion5x_setup_dev_boot_win(TSP2_NOR_BOOT_BASE,
333  TSP2_NOR_BOOT_SIZE);
334  platform_device_register(&tsp2_nor_flash);
335 
336  orion5x_ehci0_init();
337  orion5x_eth_init(&tsp2_eth_data);
338  orion5x_i2c_init();
339  orion5x_uart0_init();
340  orion5x_uart1_init();
341 
342  /* Get RTC IRQ and register the chip */
343  if (gpio_request(TSP2_RTC_GPIO, "rtc") == 0) {
344  if (gpio_direction_input(TSP2_RTC_GPIO) == 0)
345  tsp2_i2c_rtc.irq = gpio_to_irq(TSP2_RTC_GPIO);
346  else
347  gpio_free(TSP2_RTC_GPIO);
348  }
349  if (tsp2_i2c_rtc.irq == 0)
350  pr_warning("tsp2_init: failed to get RTC IRQ\n");
351  i2c_register_board_info(0, &tsp2_i2c_rtc, 1);
352 
353  /* register Terastation Pro II specific power-off method */
354  pm_power_off = tsp2_power_off;
355 }
356 
357 MACHINE_START(TERASTATION_PRO2, "Buffalo Terastation Pro II/Live")
358  /* Maintainer: Sylver Bruneau <[email protected]> */
359  .atag_offset = 0x100,
360  .init_machine = tsp2_init,
361  .map_io = orion5x_map_io,
362  .init_early = orion5x_init_early,
363  .init_irq = orion5x_init_irq,
364  .timer = &orion5x_timer,
365  .fixup = tag_fixup_mem32,
366  .restart = orion5x_restart,
367 MACHINE_END
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