diff options
Diffstat (limited to 'hw/tosa.c')
| -rw-r--r-- | hw/tosa.c | 84 |
1 files changed, 84 insertions, 0 deletions
@@ -17,6 +17,7 @@ #include "pcmcia.h" #include "block.h" #include "boards.h" +#include "i2c.h" #define TOSA_RAM 0x04000000 #define TOSA_ROM 0x00800000 @@ -39,6 +40,10 @@ #define TOSA_GPIO_CHRG_ERR_LED (TOSA_SCOOP_JC_GPIO_BASE + 2) #define TOSA_GPIO_WLAN_LED (TOSA_SCOOP_JC_GPIO_BASE + 7) +#define DAC_BASE 0x4e +#define DAC_CH1 0 +#define DAC_CH2 1 + static void tosa_microdrive_attach(struct pxa2xx_state_s *cpu) { struct pcmcia_card_s *md; @@ -105,6 +110,83 @@ static void tosa_gpio_setup(struct pxa2xx_state_s *cpu, scoop_gpio_out_set(scp1, TOSA_GPIO_WLAN_LED, outsignals[3]); } +static uint32_t tosa_ssp_read(void *opaque) +{ + return 0; +} + +static void tosa_ssp_write(void *opaque, uint32_t value) +{ + fprintf(stderr, "TG: %d %02x\n", value >> 5, value & 0x1f); +} + +struct tosa_dac_i2c { + i2c_slave i2c; + int len; + char buf[3]; +}; + +static int tosa_dac_send(i2c_slave *i2c, uint8_t data) +{ + struct tosa_dac_i2c *s = (struct tosa_dac_i2c *)i2c; + s->buf[s->len] = data; + if (s->len ++ > 2) { +#ifdef VERBOSE + fprintf(stderr, "%s: message too long (%i bytes)\n", __FUNCTION__, s->len); +#endif + return 1; + } + + if (s->len == 2) { + fprintf(stderr, "dac: channel %d value 0x%02x\n", + s->buf[0], s->buf[1]); + } + + return 0; +} + +static void tosa_dac_event(i2c_slave *i2c, enum i2c_event event) +{ + struct tosa_dac_i2c *s = (struct tosa_dac_i2c *)i2c; + s->len = 0; + switch (event) { + case I2C_START_SEND: + break; + case I2C_START_RECV: + printf("%s: recv not supported!!!\n", __FUNCTION__); + break; + case I2C_FINISH: +#ifdef VERBOSE + if (s->len < 2) + printf("%s: message too short (%i bytes)\n", __FUNCTION__, s->len); + if (s->len > 2) + printf("%s: message too long\n", __FUNCTION__); +#endif + break; + default: + break; + } +} + +int tosa_dac_recv(i2c_slave *s) +{ + printf("%s: recv not supported!!!\n", __FUNCTION__); + return -1; +} + +static void tosa_tg_init(struct pxa2xx_state_s *cpu) +{ + struct i2c_bus *bus = pxa2xx_i2c_bus(cpu->i2c[0]); + struct i2c_slave *dac = i2c_slave_init(bus, 0, sizeof(struct tosa_dac_i2c)); + dac->send = tosa_dac_send; + dac->event = tosa_dac_event; + dac->recv = tosa_dac_recv; + i2c_set_slave_address(dac, DAC_BASE); + pxa2xx_ssp_attach(cpu->ssp[1], tosa_ssp_read, + tosa_ssp_write, cpu); +} + + static struct arm_boot_info tosa_binfo = { .loader_start = PXA2XX_SDRAM_BASE, .ram_size = 0x04000000, @@ -141,6 +223,8 @@ static void tosa_init(ram_addr_t ram_size, int vga_ram_size, tosa_microdrive_attach(cpu); + tosa_tg_init(cpu); + /* Setup initial (reset) machine state */ cpu->env->regs[15] = tosa_binfo.loader_start; |