2 * mini2440 development board support
4 * Copyright Michel Pollet <buserror@gmail.com>
6 * This code is licensed under the GNU GPL v2.
14 #include "qemu-timer.h"
16 #include "audio/audio.h"
23 #include "eeprom24c0x.h"
25 #define mini2440_printf(format, ...) \
26 fprintf(stderr, "QEMU %s: " format, __FUNCTION__, ##__VA_ARGS__)
28 #define MINI2440_GPIO_BACKLIGHT S3C_GPG(4)
29 #define MINI2440_GPIO_LCD_RESET S3C_GPC(6)
30 #define MINI2440_GPIO_nSD_DETECT S3C_GPG(8)
31 #define MINI2440_GPIO_WP_SD S3C_GPH(8)
32 #define MINI2440_GPIO_DM9000 S3C_GPF(7)
33 #define MINI2440_GPIO_USB_PULLUP S3C_GPC(5)
35 #define MINI2440_IRQ_nSD_DETECT S3C_EINT(16)
36 #define MINI2440_IRQ_DM9000 S3C_EINT(7)
38 struct mini2440_board_s
{
39 struct s3c_state_s
*cpu
;
41 struct ee24c08_s
* eeprom
;
49 * the 24c08 sits on 4 addresses on the bus, and uses the lower address bits
50 * to address the 256 byte "page" of the eeprom. We thus need to use 4 i2c_slaves
51 * and keep track of which one was used to set the read/write pointer into the data
54 typedef struct ee24cxx_page_s
{
56 struct ee24c08_s
* eeprom
;
59 typedef struct ee24c08_s
{
60 /* that memory takes 4 addresses */
67 static void ee24c08_event(i2c_slave
*i2c
, enum i2c_event event
)
69 ee24cxx_page_s
*s
= FROM_I2C_SLAVE(ee24cxx_page_s
, i2c
);
74 s
->eeprom
->ptr
= s
->page
* 256;
78 static int ee24c08_tx(i2c_slave
*i2c
, uint8_t data
)
80 ee24cxx_page_s
*s
= FROM_I2C_SLAVE(ee24cxx_page_s
, i2c
);
84 if (s
->eeprom
->count
++ == 0) {
85 /* first byte is address offset */
86 s
->eeprom
->ptr
= (s
->page
* 256) + data
;
88 mini2440_printf("write %04x=%02x\n", s
->eeprom
->ptr
, data
);
89 s
->eeprom
->data
[s
->eeprom
->ptr
] = data
;
90 s
->eeprom
->ptr
= (s
->eeprom
->ptr
& ~0xff) | ((s
->eeprom
->ptr
+ 1) & 0xff);
96 static int ee24c08_rx(i2c_slave
*i2c
)
98 ee24cxx_page_s
*s
= FROM_I2C_SLAVE(ee24cxx_page_s
, i2c
);
103 res
= s
->eeprom
->data
[s
->eeprom
->ptr
];
105 s
->eeprom
->ptr
= (s
->eeprom
->ptr
& ~0xff) | ((s
->eeprom
->ptr
+ 1) & 0xff);
110 static void ee24c08_save(QEMUFile
*f
, void *opaque
)
112 struct ee24c08_s
*s
= (struct ee24c08_s
*) opaque
;
115 qemu_put_be16s(f
, &s
->ptr
);
116 qemu_put_be16s(f
, &s
->count
);
117 qemu_put_buffer(f
, s
->data
, sizeof(s
->data
));
119 for (i
= 0; i
< 4; i
++)
120 i2c_slave_save(f
, s
->slave
[i
]);
123 static int ee24c08_load(QEMUFile
*f
, void *opaque
, int version_id
)
125 struct ee24c08_s
*s
= (struct ee24c08_s
*) opaque
;
128 qemu_get_be16s(f
, &s
->ptr
);
129 qemu_get_be16s(f
, &s
->count
);
130 qemu_get_buffer(f
, s
->data
, sizeof(s
->data
));
132 for (i
= 0; i
< 4; i
++)
133 i2c_slave_load(f
, s
->slave
[i
]);
137 static void ee24c08_page_init(i2c_slave
*i2c
)
139 /* nothing to do here */
142 static I2CSlaveInfo ee24c08_info
= {
143 .init
= ee24c08_page_init
,
144 .event
= ee24c08_event
,
149 static void ee24c08_register_devices(void)
151 i2c_register_slave("24C08", sizeof(ee24cxx_page_s
), &ee24c08_info
);
154 device_init(ee24c08_register_devices
);
156 static ee24c08
* ee24c08_init(i2c_bus
* bus
)
158 ee24c08
*s
= qemu_malloc(sizeof(ee24c08
));
161 printf("QEMU: %s\n", __FUNCTION__
);
163 memset(s
->data
, 0xff, sizeof(s
->data
));
165 for (i
= 0; i
< 4; i
++) {
166 DeviceState
*dev
= i2c_create_slave(bus
, "24C08", 0x50 + i
);
168 mini2440_printf("failed address %02x\n", 0x50+i
);
170 s
->slave
[i
] = I2C_SLAVE_FROM_QDEV(dev
);
171 ee24cxx_page_s
*ss
= FROM_I2C_SLAVE(ee24cxx_page_s
, s
->slave
[i
]);
175 register_savevm("ee24c08", -1, 0, ee24c08_save
, ee24c08_load
, s
);
179 /* Handlers for output ports */
180 static void mini2440_bl_switch(void *opaque
, int line
, int level
)
182 printf("QEMU: %s: LCD Backlight now %s (%d).\n", __FUNCTION__
, level
? "on" : "off", level
);
185 static void mini2440_bl_intensity(int line
, int level
, void *opaque
)
187 struct mini2440_board_s
*s
= (struct mini2440_board_s
*) opaque
;
189 if ((level
>> 8) != s
->bl_level
) {
190 s
->bl_level
= level
>> 8;
191 printf("%s: LCD Backlight now at %04x\n", __FUNCTION__
, level
);
195 static void mini2440_gpio_setup(struct mini2440_board_s
*s
)
197 /* set the "input" pin values */
198 s3c_gpio_set_dat(s
->cpu
->io
, S3C_GPG(13), 1);
199 s3c_gpio_set_dat(s
->cpu
->io
, S3C_GPG(14), 1);
200 s3c_gpio_set_dat(s
->cpu
->io
, S3C_GPG(15), 0);
202 s3c_gpio_out_set(s
->cpu
->io
, MINI2440_GPIO_BACKLIGHT
,
203 *qemu_allocate_irqs(mini2440_bl_switch
, s
, 1));
205 s3c_timers_cmp_handler_set(s
->cpu
->timers
, 1, mini2440_bl_intensity
, s
);
207 /* Register the SD card pins to the lower SD driver */
209 s3c_gpio_in_get(s
->cpu
->io
)[MINI2440_GPIO_WP_SD
],
210 qemu_irq_invert(s3c_gpio_in_get(s
->cpu
->io
)[MINI2440_IRQ_nSD_DETECT
]));
215 static void hexdump(const void* address
, uint32_t len
)
217 const unsigned char* p
= address
;
220 for (i
= 0; i
< len
; i
+= 16) {
221 for (j
= 0; j
< 16 && i
+ j
< len
; j
++)
222 fprintf(stderr
, "%02x ", p
[i
+ j
]);
224 fprintf(stderr
, " ");
225 fprintf(stderr
, " ");
226 for (j
= 0; j
< 16 && i
+ j
< len
; j
++)
227 fprintf(stderr
, "%c", (p
[i
+ j
] < ' ' || p
[i
+ j
] > 0x7f) ? '.' : p
[i
+ j
]);
228 fprintf(stderr
, "\n");
233 static int mini2440_load_from_nand(NANDFlashState
*nand
,
234 uint32_t nand_offset
, uint32_t s3c_base_offset
, uint32_t size
)
244 for (page
= 0; page
< (size
/ 512); page
++, src
+= 512 + 16, dst
+= 512) {
245 if (nand_readraw(nand
, nand_offset
+ src
, buffer
, 512)) {
246 cpu_physical_memory_write(s3c_base_offset
+ dst
, buffer
, 512);
248 mini2440_printf("failed to load nand %d:%d\n",
249 nand_offset
+ src
, 512 + 16);
256 static void mini2440_reset(void *opaque
)
258 struct mini2440_board_s
*s
= (struct mini2440_board_s
*) opaque
;
262 * Normally we would load 4 KB of nand to SRAM and jump there, but
263 * it is not working perfectly as expected, so we cheat and load
264 * it from nand directly relocated to 0x33f80000 and jump there
266 if (mini2440_load_from_nand(s
->nand
, 0, S3C_RAM_BASE
| 0x03f80000, 256*1024)> 0) {
267 mini2440_printf("loaded default u-boot from NAND\n");
268 s
->cpu
->env
->regs
[15] = S3C_RAM_BASE
| 0x03f80000; /* start address, u-boot already relocated */
270 #if 0 && defined(LATER)
271 if (mini2440_load_from_nand(s
->nand
, 0, S3C_SRAM_BASE_NANDBOOT
, S3C_SRAM_SIZE
) > 0) {
272 s
->cpu
->env
->regs
[15] = S3C_SRAM_BASE_NANDBOOT
; /* start address, u-boot relocating code */
273 mini2440_printf("4KB SteppingStone loaded from NAND\n");
277 * if a u--boot is available as a file, we always use it
280 image_size
= load_image("mini2440/u-boot.bin", qemu_get_ram_ptr(0x03f80000));
282 image_size
= load_image("u-boot.bin", qemu_get_ram_ptr(0x03f80000));
283 if (image_size
> 0) {
284 if (image_size
& (512 -1)) /* round size to a NAND block size */
285 image_size
= (image_size
+ 512) & ~(512-1);
286 mini2440_printf("loaded override u-boot (size %x)\n", image_size
);
287 s
->cpu
->env
->regs
[15] = S3C_RAM_BASE
| 0x03f80000; /* start address, u-boot already relocated */
291 * if a kernel was explicitly specified, we load it too
294 image_size
= load_image(s
->kernel
, qemu_get_ram_ptr(0x02000000));
295 if (image_size
> 0) {
296 if (image_size
& (512 -1)) /* round size to a NAND block size */
297 image_size
= (image_size
+ 512) & ~(512-1);
298 mini2440_printf("loaded %s (size %x)\n", s
->kernel
, image_size
);
303 /* Typical touchscreen calibration values */
304 static const int mini2440_ts_scale
[6] = {
305 0, (90 - 960) * 256 / 1021, -90 * 256 * 32,
306 (940 - 75) * 256 / 1021, 0, 75 * 256 * 32,
310 static struct mini2440_board_s
*mini2440_init_common(int ram_size
,
311 const char *kernel_filename
, const char *cpu_model
,
314 struct mini2440_board_s
*s
= (struct mini2440_board_s
*)
315 qemu_mallocz(sizeof(struct mini2440_board_s
));
318 s
->kernel
= kernel_filename
;
321 /* Setup CPU & memory */
322 if (ram_size
< s
->ram
+ S3C_SRAM_SIZE
) {
323 mini2440_printf("This platform requires %i bytes of memory (not %d)\n",
324 s
->ram
+ S3C_SRAM_SIZE
, ram_size
);
327 if (cpu_model
&& strcmp(cpu_model
, "arm920t")) {
328 mini2440_printf("This platform requires an ARM920T core\n");
331 s
->cpu
= s3c24xx_init(S3C_CPU_2440
, 12000000 /* 12 mhz */, s
->ram
, S3C_SRAM_BASE_NANDBOOT
, s
->mmc
);
333 /* Setup peripherals */
334 mini2440_gpio_setup(s
);
336 s
->eeprom
= ee24c08_init(s3c_i2c_bus(s
->cpu
->i2c
));
342 nd
->model
= "dm9000";
343 if (strcmp(nd
->model
, "dm9000") == 0) {
344 dm9000_init(nd
, 0x20000000, 0x300, 0x304, s3c_gpio_in_get(s
->cpu
->io
)[MINI2440_IRQ_DM9000
]);
348 s3c_adc_setscale(s
->cpu
->adc
, mini2440_ts_scale
);
350 /* Setup initial (reset) machine state */
351 qemu_register_reset(mini2440_reset
, s
);
357 static void mini2440_init(ram_addr_t ram_size
,
358 const char *boot_device
,
359 const char *kernel_filename
,
360 const char *kernel_cmdline
,
361 const char *initrd_filename
,
362 const char *cpu_model
)
364 struct mini2440_board_s
*mini
;
365 int sd_idx
= drive_get_index(IF_SD
, 0, 0);
369 sd
= sd_init(drives_table
[sd_idx
].bdrv
, 0);
371 mini
= mini2440_init_common(ram_size
,
372 kernel_filename
, cpu_model
, sd
);
374 mini
->nand
= nand_init(NAND_MFR_SAMSUNG
, 0x76);
375 mini
->cpu
->nand
->reg(mini
->cpu
->nand
, mini
->nand
);
377 mini2440_reset(mini
);
380 QEMUMachine mini2440_machine
= {
382 "MINI2440 Chinese Samsung SoC dev board (S3C2440A)",
383 .init
= mini2440_init
,