hw/i2c: Add a NULL check for i2c slave init callbacks
[qemu/ar7.git] / hw / arm / z2.c
blobb3a6bbd210795b1e64364aba386c88bc6d93ddc4
1 /*
2 * PXA270-based Zipit Z2 device
4 * Copyright (c) 2011 by Vasily Khoruzhick <anarsoul@gmail.com>
6 * Code is based on mainstone platform.
8 * This code is licensed under the GNU GPL v2.
10 * Contributions after 2012-01-13 are licensed under the terms of the
11 * GNU GPL, version 2 or (at your option) any later version.
14 #include "qemu/osdep.h"
15 #include "hw/hw.h"
16 #include "hw/arm/pxa.h"
17 #include "hw/arm/arm.h"
18 #include "hw/devices.h"
19 #include "hw/i2c/i2c.h"
20 #include "hw/ssi/ssi.h"
21 #include "hw/boards.h"
22 #include "sysemu/sysemu.h"
23 #include "hw/block/flash.h"
24 #include "sysemu/block-backend.h"
25 #include "ui/console.h"
26 #include "audio/audio.h"
27 #include "exec/address-spaces.h"
28 #include "sysemu/qtest.h"
30 #ifdef DEBUG_Z2
31 #define DPRINTF(fmt, ...) \
32 printf(fmt, ## __VA_ARGS__)
33 #else
34 #define DPRINTF(fmt, ...)
35 #endif
37 static const struct keymap map[0x100] = {
38 [0 ... 0xff] = { -1, -1 },
39 [0x3b] = {0, 0}, /* Option = F1 */
40 [0xc8] = {0, 1}, /* Up */
41 [0xd0] = {0, 2}, /* Down */
42 [0xcb] = {0, 3}, /* Left */
43 [0xcd] = {0, 4}, /* Right */
44 [0xcf] = {0, 5}, /* End */
45 [0x0d] = {0, 6}, /* KPPLUS */
46 [0xc7] = {1, 0}, /* Home */
47 [0x10] = {1, 1}, /* Q */
48 [0x17] = {1, 2}, /* I */
49 [0x22] = {1, 3}, /* G */
50 [0x2d] = {1, 4}, /* X */
51 [0x1c] = {1, 5}, /* Enter */
52 [0x0c] = {1, 6}, /* KPMINUS */
53 [0xc9] = {2, 0}, /* PageUp */
54 [0x11] = {2, 1}, /* W */
55 [0x18] = {2, 2}, /* O */
56 [0x23] = {2, 3}, /* H */
57 [0x2e] = {2, 4}, /* C */
58 [0x38] = {2, 5}, /* LeftAlt */
59 [0xd1] = {3, 0}, /* PageDown */
60 [0x12] = {3, 1}, /* E */
61 [0x19] = {3, 2}, /* P */
62 [0x24] = {3, 3}, /* J */
63 [0x2f] = {3, 4}, /* V */
64 [0x2a] = {3, 5}, /* LeftShift */
65 [0x01] = {4, 0}, /* Esc */
66 [0x13] = {4, 1}, /* R */
67 [0x1e] = {4, 2}, /* A */
68 [0x25] = {4, 3}, /* K */
69 [0x30] = {4, 4}, /* B */
70 [0x1d] = {4, 5}, /* LeftCtrl */
71 [0x0f] = {5, 0}, /* Tab */
72 [0x14] = {5, 1}, /* T */
73 [0x1f] = {5, 2}, /* S */
74 [0x26] = {5, 3}, /* L */
75 [0x31] = {5, 4}, /* N */
76 [0x39] = {5, 5}, /* Space */
77 [0x3c] = {6, 0}, /* Stop = F2 */
78 [0x15] = {6, 1}, /* Y */
79 [0x20] = {6, 2}, /* D */
80 [0x0e] = {6, 3}, /* Backspace */
81 [0x32] = {6, 4}, /* M */
82 [0x33] = {6, 5}, /* Comma */
83 [0x3d] = {7, 0}, /* Play = F3 */
84 [0x16] = {7, 1}, /* U */
85 [0x21] = {7, 2}, /* F */
86 [0x2c] = {7, 3}, /* Z */
87 [0x27] = {7, 4}, /* Semicolon */
88 [0x34] = {7, 5}, /* Dot */
91 #define Z2_RAM_SIZE 0x02000000
92 #define Z2_FLASH_BASE 0x00000000
93 #define Z2_FLASH_SIZE 0x00800000
95 static struct arm_boot_info z2_binfo = {
96 .loader_start = PXA2XX_SDRAM_BASE,
97 .ram_size = Z2_RAM_SIZE,
100 #define Z2_GPIO_SD_DETECT 96
101 #define Z2_GPIO_AC_IN 0
102 #define Z2_GPIO_KEY_ON 1
103 #define Z2_GPIO_LCD_CS 88
105 typedef struct {
106 SSISlave ssidev;
107 int32_t selected;
108 int32_t enabled;
109 uint8_t buf[3];
110 uint32_t cur_reg;
111 int pos;
112 } ZipitLCD;
114 static uint32_t zipit_lcd_transfer(SSISlave *dev, uint32_t value)
116 ZipitLCD *z = FROM_SSI_SLAVE(ZipitLCD, dev);
117 uint16_t val;
118 if (z->selected) {
119 z->buf[z->pos] = value & 0xff;
120 z->pos++;
122 if (z->pos == 3) {
123 switch (z->buf[0]) {
124 case 0x74:
125 DPRINTF("%s: reg: 0x%.2x\n", __func__, z->buf[2]);
126 z->cur_reg = z->buf[2];
127 break;
128 case 0x76:
129 val = z->buf[1] << 8 | z->buf[2];
130 DPRINTF("%s: value: 0x%.4x\n", __func__, val);
131 if (z->cur_reg == 0x22 && val == 0x0000) {
132 z->enabled = 1;
133 printf("%s: LCD enabled\n", __func__);
134 } else if (z->cur_reg == 0x10 && val == 0x0000) {
135 z->enabled = 0;
136 printf("%s: LCD disabled\n", __func__);
138 break;
139 default:
140 DPRINTF("%s: unknown command!\n", __func__);
141 break;
143 z->pos = 0;
145 return 0;
148 static void z2_lcd_cs(void *opaque, int line, int level)
150 ZipitLCD *z2_lcd = opaque;
151 z2_lcd->selected = !level;
154 static void zipit_lcd_realize(SSISlave *dev, Error **errp)
156 ZipitLCD *z = FROM_SSI_SLAVE(ZipitLCD, dev);
157 z->selected = 0;
158 z->enabled = 0;
159 z->pos = 0;
162 static VMStateDescription vmstate_zipit_lcd_state = {
163 .name = "zipit-lcd",
164 .version_id = 2,
165 .minimum_version_id = 2,
166 .fields = (VMStateField[]) {
167 VMSTATE_SSI_SLAVE(ssidev, ZipitLCD),
168 VMSTATE_INT32(selected, ZipitLCD),
169 VMSTATE_INT32(enabled, ZipitLCD),
170 VMSTATE_BUFFER(buf, ZipitLCD),
171 VMSTATE_UINT32(cur_reg, ZipitLCD),
172 VMSTATE_INT32(pos, ZipitLCD),
173 VMSTATE_END_OF_LIST(),
177 static void zipit_lcd_class_init(ObjectClass *klass, void *data)
179 DeviceClass *dc = DEVICE_CLASS(klass);
180 SSISlaveClass *k = SSI_SLAVE_CLASS(klass);
182 k->realize = zipit_lcd_realize;
183 k->transfer = zipit_lcd_transfer;
184 dc->vmsd = &vmstate_zipit_lcd_state;
187 static const TypeInfo zipit_lcd_info = {
188 .name = "zipit-lcd",
189 .parent = TYPE_SSI_SLAVE,
190 .instance_size = sizeof(ZipitLCD),
191 .class_init = zipit_lcd_class_init,
194 #define TYPE_AER915 "aer915"
195 #define AER915(obj) OBJECT_CHECK(AER915State, (obj), TYPE_AER915)
197 typedef struct AER915State {
198 I2CSlave parent_obj;
200 int len;
201 uint8_t buf[3];
202 } AER915State;
204 static int aer915_send(I2CSlave *i2c, uint8_t data)
206 AER915State *s = AER915(i2c);
208 s->buf[s->len] = data;
209 if (s->len++ > 2) {
210 DPRINTF("%s: message too long (%i bytes)\n",
211 __func__, s->len);
212 return 1;
215 if (s->len == 2) {
216 DPRINTF("%s: reg %d value 0x%02x\n", __func__,
217 s->buf[0], s->buf[1]);
220 return 0;
223 static void aer915_event(I2CSlave *i2c, enum i2c_event event)
225 AER915State *s = AER915(i2c);
227 switch (event) {
228 case I2C_START_SEND:
229 s->len = 0;
230 break;
231 case I2C_START_RECV:
232 if (s->len != 1) {
233 DPRINTF("%s: short message!?\n", __func__);
235 break;
236 case I2C_FINISH:
237 break;
238 default:
239 break;
243 static int aer915_recv(I2CSlave *slave)
245 AER915State *s = AER915(slave);
246 int retval = 0x00;
248 switch (s->buf[0]) {
249 /* Return hardcoded battery voltage,
250 * 0xf0 means ~4.1V
252 case 0x02:
253 retval = 0xf0;
254 break;
255 /* Return 0x00 for other regs,
256 * we don't know what they are for,
257 * anyway they return 0x00 on real hardware.
259 default:
260 break;
263 return retval;
266 static VMStateDescription vmstate_aer915_state = {
267 .name = "aer915",
268 .version_id = 1,
269 .minimum_version_id = 1,
270 .fields = (VMStateField[]) {
271 VMSTATE_INT32(len, AER915State),
272 VMSTATE_BUFFER(buf, AER915State),
273 VMSTATE_END_OF_LIST(),
277 static void aer915_class_init(ObjectClass *klass, void *data)
279 DeviceClass *dc = DEVICE_CLASS(klass);
280 I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
282 k->event = aer915_event;
283 k->recv = aer915_recv;
284 k->send = aer915_send;
285 dc->vmsd = &vmstate_aer915_state;
288 static const TypeInfo aer915_info = {
289 .name = TYPE_AER915,
290 .parent = TYPE_I2C_SLAVE,
291 .instance_size = sizeof(AER915State),
292 .class_init = aer915_class_init,
295 static void z2_init(MachineState *machine)
297 const char *cpu_model = machine->cpu_model;
298 const char *kernel_filename = machine->kernel_filename;
299 const char *kernel_cmdline = machine->kernel_cmdline;
300 const char *initrd_filename = machine->initrd_filename;
301 MemoryRegion *address_space_mem = get_system_memory();
302 uint32_t sector_len = 0x10000;
303 PXA2xxState *mpu;
304 DriveInfo *dinfo;
305 int be;
306 void *z2_lcd;
307 I2CBus *bus;
308 DeviceState *wm;
310 if (!cpu_model) {
311 cpu_model = "pxa270-c5";
314 /* Setup CPU & memory */
315 mpu = pxa270_init(address_space_mem, z2_binfo.ram_size, cpu_model);
317 #ifdef TARGET_WORDS_BIGENDIAN
318 be = 1;
319 #else
320 be = 0;
321 #endif
322 dinfo = drive_get(IF_PFLASH, 0, 0);
323 if (!dinfo && !qtest_enabled()) {
324 fprintf(stderr, "Flash image must be given with the "
325 "'pflash' parameter\n");
326 exit(1);
329 if (!pflash_cfi01_register(Z2_FLASH_BASE,
330 NULL, "z2.flash0", Z2_FLASH_SIZE,
331 dinfo ? blk_by_legacy_dinfo(dinfo) : NULL,
332 sector_len, Z2_FLASH_SIZE / sector_len,
333 4, 0, 0, 0, 0, be)) {
334 fprintf(stderr, "qemu: Error registering flash memory.\n");
335 exit(1);
338 /* setup keypad */
339 pxa27x_register_keypad(mpu->kp, map, 0x100);
341 /* MMC/SD host */
342 pxa2xx_mmci_handlers(mpu->mmc,
343 NULL,
344 qdev_get_gpio_in(mpu->gpio, Z2_GPIO_SD_DETECT));
346 type_register_static(&zipit_lcd_info);
347 type_register_static(&aer915_info);
348 z2_lcd = ssi_create_slave(mpu->ssp[1], "zipit-lcd");
349 bus = pxa2xx_i2c_bus(mpu->i2c[0]);
350 i2c_create_slave(bus, TYPE_AER915, 0x55);
351 wm = i2c_create_slave(bus, "wm8750", 0x1b);
352 mpu->i2s->opaque = wm;
353 mpu->i2s->codec_out = wm8750_dac_dat;
354 mpu->i2s->codec_in = wm8750_adc_dat;
355 wm8750_data_req_set(wm, mpu->i2s->data_req, mpu->i2s);
357 qdev_connect_gpio_out(mpu->gpio, Z2_GPIO_LCD_CS,
358 qemu_allocate_irq(z2_lcd_cs, z2_lcd, 0));
360 z2_binfo.kernel_filename = kernel_filename;
361 z2_binfo.kernel_cmdline = kernel_cmdline;
362 z2_binfo.initrd_filename = initrd_filename;
363 z2_binfo.board_id = 0x6dd;
364 arm_load_kernel(mpu->cpu, &z2_binfo);
367 static void z2_machine_init(MachineClass *mc)
369 mc->desc = "Zipit Z2 (PXA27x)";
370 mc->init = z2_init;
373 DEFINE_MACHINE("z2", z2_machine_init)