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Linux/arch/arm/mach-orion5x/terastation_pro2-setup.c

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  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 
 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 
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         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 

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