1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Buffalo Terastation Pro II/Live Board Setup
4 *
5 * Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com>
6 */
7 #include <linux/gpio.h>
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/platform_device.h>
11 #include <linux/pci.h>
12 #include <linux/irq.h>
13 #include <linux/delay.h>
14 #include <linux/mtd/physmap.h>
15 #include <linux/mv643xx_eth.h>
16 #include <linux/i2c.h>
17 #include <linux/serial_reg.h>
18 #include <asm/mach-types.h>
19 #include <asm/mach/arch.h>
20 #include <asm/mach/pci.h>
21 #include "common.h"
22 #include "mpp.h"
23 #include "orion5x.h"
24
25 /*****************************************************************************
26 * Terastation Pro 2/Live Info
27 ****************************************************************************/
28
29 /*
30 * Terastation Pro 2 hardware :
31 * - Marvell 88F5281-D0
32 * - Marvell 88SX6042 SATA controller (PCI)
33 * - Marvell 88E1118 Gigabit Ethernet PHY
34 * - 256KB NOR flash
35 * - 128MB of DDR RAM
36 * - PCIe port (not equipped)
37 */
38
39 /*
40 * 256K NOR flash Device bus boot chip select
41 */
42
43 #define TSP2_NOR_BOOT_BASE 0xf4000000
44 #define TSP2_NOR_BOOT_SIZE SZ_256K
45
46 /*****************************************************************************
47 * 256KB NOR Flash on BOOT Device
48 ****************************************************************************/
49
50 static struct physmap_flash_data tsp2_nor_flash_data = {
51 .width = 1,
52 };
53
54 static struct resource tsp2_nor_flash_resource = {
55 .flags = IORESOURCE_MEM,
56 .start = TSP2_NOR_BOOT_BASE,
57 .end = TSP2_NOR_BOOT_BASE + TSP2_NOR_BOOT_SIZE - 1,
58 };
59
60 static struct platform_device tsp2_nor_flash = {
61 .name = "physmap-flash",
62 .id = 0,
63 .dev = {
64 .platform_data = &tsp2_nor_flash_data,
65 },
66 .num_resources = 1,
67 .resource = &tsp2_nor_flash_resource,
68 };
69
70 /*****************************************************************************
71 * PCI
72 ****************************************************************************/
73 #define TSP2_PCI_SLOT0_OFFS 7
74 #define TSP2_PCI_SLOT0_IRQ_PIN 11
75
76 static void __init tsp2_pci_preinit(void)
77 {
78 int pin;
79
80 /*
81 * Configure PCI GPIO IRQ pins
82 */
83 pin = TSP2_PCI_SLOT0_IRQ_PIN;
84 if (gpio_request(pin, "PCI Int1") == 0) {
85 if (gpio_direction_input(pin) == 0) {
86 irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
87 } else {
88 printk(KERN_ERR "tsp2_pci_preinit failed "
89 "to set_irq_type pin %d\n", pin);
90 gpio_free(pin);
91 }
92 } else {
93 printk(KERN_ERR "tsp2_pci_preinit failed to "
94 "gpio_request %d\n", pin);
95 }
96 }
97
98 static int __init tsp2_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
99 {
100 int irq;
101
102 /*
103 * Check for devices with hard-wired IRQs.
104 */
105 irq = orion5x_pci_map_irq(dev, slot, pin);
106 if (irq != -1)
107 return irq;
108
109 /*
110 * PCI IRQs are connected via GPIOs.
111 */
112 if (slot == TSP2_PCI_SLOT0_OFFS)
113 return gpio_to_irq(TSP2_PCI_SLOT0_IRQ_PIN);
114
115 return -1;
116 }
117
118 static struct hw_pci tsp2_pci __initdata = {
119 .nr_controllers = 2,
120 .preinit = tsp2_pci_preinit,
121 .setup = orion5x_pci_sys_setup,
122 .scan = orion5x_pci_sys_scan_bus,
123 .map_irq = tsp2_pci_map_irq,
124 };
125
126 static int __init tsp2_pci_init(void)
127 {
128 if (machine_is_terastation_pro2())
129 pci_common_init(&tsp2_pci);
130
131 return 0;
132 }
133
134 subsys_initcall(tsp2_pci_init);
135
136 /*****************************************************************************
137 * Ethernet
138 ****************************************************************************/
139
140 static struct mv643xx_eth_platform_data tsp2_eth_data = {
141 .phy_addr = 0,
142 };
143
144 /*****************************************************************************
145 * RTC 5C372a on I2C bus
146 ****************************************************************************/
147
148 #define TSP2_RTC_GPIO 9
149
150 static struct i2c_board_info __initdata tsp2_i2c_rtc = {
151 I2C_BOARD_INFO("rs5c372a", 0x32),
152 };
153
154 /*****************************************************************************
155 * Terastation Pro II specific power off method via UART1-attached
156 * microcontroller
157 ****************************************************************************/
158
159 #define UART1_REG(x) (UART1_VIRT_BASE + ((UART_##x) << 2))
160
161 static int tsp2_miconread(unsigned char *buf, int count)
162 {
163 int i;
164 int timeout;
165
166 for (i = 0; i < count; i++) {
167 timeout = 10;
168
169 while (!(readl(UART1_REG(LSR)) & UART_LSR_DR)) {
170 if (--timeout == 0)
171 break;
172 udelay(1000);
173 }
174
175 if (timeout == 0)
176 break;
177 buf[i] = readl(UART1_REG(RX));
178 }
179
180 /* return read bytes */
181 return i;
182 }
183
184 static int tsp2_miconwrite(const unsigned char *buf, int count)
185 {
186 int i = 0;
187
188 while (count--) {
189 while (!(readl(UART1_REG(LSR)) & UART_LSR_THRE))
190 barrier();
191 writel(buf[i++], UART1_REG(TX));
192 }
193
194 return 0;
195 }
196
197 static int tsp2_miconsend(const unsigned char *data, int count)
198 {
199 int i;
200 unsigned char checksum = 0;
201 unsigned char recv_buf[40];
202 unsigned char send_buf[40];
203 unsigned char correct_ack[3];
204 int retry = 2;
205
206 /* Generate checksum */
207 for (i = 0; i < count; i++)
208 checksum -= data[i];
209
210 do {
211 /* Send data */
212 tsp2_miconwrite(data, count);
213
214 /* send checksum */
215 tsp2_miconwrite(&checksum, 1);
216
217 if (tsp2_miconread(recv_buf, sizeof(recv_buf)) <= 3) {
218 printk(KERN_ERR ">%s: receive failed.\n", __func__);
219
220 /* send preamble to clear the receive buffer */
221 memset(&send_buf, 0xff, sizeof(send_buf));
222 tsp2_miconwrite(send_buf, sizeof(send_buf));
223
224 /* make dummy reads */
225 mdelay(100);
226 tsp2_miconread(recv_buf, sizeof(recv_buf));
227 } else {
228 /* Generate expected ack */
229 correct_ack[0] = 0x01;
230 correct_ack[1] = data[1];
231 correct_ack[2] = 0x00;
232
233 /* checksum Check */
234 if ((recv_buf[0] + recv_buf[1] + recv_buf[2] +
235 recv_buf[3]) & 0xFF) {
236 printk(KERN_ERR ">%s: Checksum Error : "
237 "Received data[%02x, %02x, %02x, %02x]"
238 "\n", __func__, recv_buf[0],
239 recv_buf[1], recv_buf[2], recv_buf[3]);
240 } else {
241 /* Check Received Data */
242 if (correct_ack[0] == recv_buf[0] &&
243 correct_ack[1] == recv_buf[1] &&
244 correct_ack[2] == recv_buf[2]) {
245 /* Interval for next command */
246 mdelay(10);
247
248 /* Receive ACK */
249 return 0;
250 }
251 }
252 /* Received NAK or illegal Data */
253 printk(KERN_ERR ">%s: Error : NAK or Illegal Data "
254 "Received\n", __func__);
255 }
256 } while (retry--);
257
258 /* Interval for next command */
259 mdelay(10);
260
261 return -1;
262 }
263
264 static void tsp2_power_off(void)
265 {
266 const unsigned char watchdogkill[] = {0x01, 0x35, 0x00};
267 const unsigned char shutdownwait[] = {0x00, 0x0c};
268 const unsigned char poweroff[] = {0x00, 0x06};
269 /* 38400 baud divisor */
270 const unsigned divisor = ((orion5x_tclk + (8 * 38400)) / (16 * 38400));
271
272 pr_info("%s: triggering power-off...\n", __func__);
273
274 /* hijack uart1 and reset into sane state (38400,8n1,even parity) */
275 writel(0x83, UART1_REG(LCR));
276 writel(divisor & 0xff, UART1_REG(DLL));
277 writel((divisor >> 8) & 0xff, UART1_REG(DLM));
278 writel(0x1b, UART1_REG(LCR));
279 writel(0x00, UART1_REG(IER));
280 writel(0x07, UART1_REG(FCR));
281 writel(0x00, UART1_REG(MCR));
282
283 /* Send the commands to shutdown the Terastation Pro II */
284 tsp2_miconsend(watchdogkill, sizeof(watchdogkill)) ;
285 tsp2_miconsend(shutdownwait, sizeof(shutdownwait)) ;
286 tsp2_miconsend(poweroff, sizeof(poweroff));
287 }
288
289 /*****************************************************************************
290 * General Setup
291 ****************************************************************************/
292 static unsigned int tsp2_mpp_modes[] __initdata = {
293 MPP0_PCIE_RST_OUTn,
294 MPP1_UNUSED,
295 MPP2_UNUSED,
296 MPP3_UNUSED,
297 MPP4_NAND, /* BOOT NAND Flash REn */
298 MPP5_NAND, /* BOOT NAND Flash WEn */
299 MPP6_NAND, /* BOOT NAND Flash HREn[0] */
300 MPP7_NAND, /* BOOT NAND Flash WEn[0] */
301 MPP8_GPIO, /* MICON int */
302 MPP9_GPIO, /* RTC int */
303 MPP10_UNUSED,
304 MPP11_GPIO, /* PCI Int A */
305 MPP12_UNUSED,
306 MPP13_GPIO, /* UPS on UART0 enable */
307 MPP14_GPIO, /* UPS low battery detection */
308 MPP15_UNUSED,
309 MPP16_UART, /* UART1 RXD */
310 MPP17_UART, /* UART1 TXD */
311 MPP18_UART, /* UART1 CTSn */
312 MPP19_UART, /* UART1 RTSn */
313 0,
314 };
315
316 static void __init tsp2_init(void)
317 {
318 /*
319 * Setup basic Orion functions. Need to be called early.
320 */
321 orion5x_init();
322
323 orion5x_mpp_conf(tsp2_mpp_modes);
324
325 /*
326 * Configure peripherals.
327 */
328 mvebu_mbus_add_window_by_id(ORION_MBUS_DEVBUS_BOOT_TARGET,
329 ORION_MBUS_DEVBUS_BOOT_ATTR,
330 TSP2_NOR_BOOT_BASE,
331 TSP2_NOR_BOOT_SIZE);
332 platform_device_register(&tsp2_nor_flash);
333
334 orion5x_ehci0_init();
335 orion5x_eth_init(&tsp2_eth_data);
336 orion5x_i2c_init();
337 orion5x_uart0_init();
338 orion5x_uart1_init();
339
340 /* Get RTC IRQ and register the chip */
341 if (gpio_request(TSP2_RTC_GPIO, "rtc") == 0) {
342 if (gpio_direction_input(TSP2_RTC_GPIO) == 0)
343 tsp2_i2c_rtc.irq = gpio_to_irq(TSP2_RTC_GPIO);
344 else
345 gpio_free(TSP2_RTC_GPIO);
346 }
347 if (tsp2_i2c_rtc.irq == 0)
348 pr_warn("tsp2_init: failed to get RTC IRQ\n");
349 i2c_register_board_info(0, &tsp2_i2c_rtc, 1);
350
351 /* register Terastation Pro II specific power-off method */
352 pm_power_off = tsp2_power_off;
353 }
354
355 MACHINE_START(TERASTATION_PRO2, "Buffalo Terastation Pro II/Live")
356 /* Maintainer: Sylver Bruneau <sylver.bruneau@googlemail.com> */
357 .atag_offset = 0x100,
358 .nr_irqs = ORION5X_NR_IRQS,
359 .init_machine = tsp2_init,
360 .map_io = orion5x_map_io,
361 .init_early = orion5x_init_early,
362 .init_irq = orion5x_init_irq,
363 .init_time = orion5x_timer_init,
364 .fixup = tag_fixup_mem32,
365 .restart = orion5x_restart,
366 MACHINE_END
367
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