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Partial SD card SPI mode support.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3731 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2007-11-24 23:35:08 +00:00
parent f3b9f95432
commit 775616c3ae
12 changed files with 370 additions and 16 deletions
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60
hw/stellaris.c
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@ -14,6 +14,7 @@
#include "qemu-timer.h"
#include "i2c.h"
#include "net.h"
#include "sd.h"
#include "sysemu.h"
#include "boards.h"
@ -1000,6 +1001,51 @@ static qemu_irq stellaris_adc_init(uint32_t base, qemu_irq irq)
return qi[0];
}
/* Some boards have both an OLED controller and SD card connected to
the same SSI port, with the SD card chip select connected to a
GPIO pin. Technically the OLED chip select is connected to the SSI
Fss pin. We do not bother emulating that as both devices should
never be selected simultaneously, and our OLED controller ignores stray
0xff commands that occur when deselecting the SD card. */
typedef struct {
ssi_xfer_cb xfer_cb[2];
void *opaque[2];
qemu_irq irq;
int current_dev;
} stellaris_ssi_bus_state;
static void stellaris_ssi_bus_select(void *opaque, int irq, int level)
{
stellaris_ssi_bus_state *s = (stellaris_ssi_bus_state *)opaque;
s->current_dev = level;
}
static int stellaris_ssi_bus_xfer(void *opaque, int val)
{
stellaris_ssi_bus_state *s = (stellaris_ssi_bus_state *)opaque;
return s->xfer_cb[s->current_dev](s->opaque[s->current_dev], val);
}
static void *stellaris_ssi_bus_init(qemu_irq *irqp,
ssi_xfer_cb cb0, void *opaque0,
ssi_xfer_cb cb1, void *opaque1)
{
qemu_irq *qi;
stellaris_ssi_bus_state *s;
s = (stellaris_ssi_bus_state *)qemu_mallocz(sizeof(stellaris_ssi_bus_state));
s->xfer_cb[0] = cb0;
s->opaque[0] = opaque0;
s->xfer_cb[1] = cb1;
s->opaque[1] = opaque1;
qi = qemu_allocate_irqs(stellaris_ssi_bus_select, s, 1);
*irqp = *qi;
return s;
}
/* Board init. */
static stellaris_board_info stellaris_boards[] = {
{ "LM3S811EVB",
@ -1085,9 +1131,19 @@ static void stellaris_init(const char *kernel_filename, const char *cpu_model,
if (board->dc2 & (1 << 4)) {
if (board->peripherals & BP_OLED_SSI) {
void * oled;
/* FIXME: Implement chip select for OLED/MMC. */
void * sd;
void *ssi_bus;
oled = ssd0323_init(ds, &gpio_out[GPIO_C][7]);
pl022_init(0x40008000, pic[7], ssd0323_xfer_ssi, oled);
sd = ssi_sd_init(sd_bdrv);
ssi_bus = stellaris_ssi_bus_init(&gpio_out[GPIO_D][0],
ssi_sd_xfer, sd,
ssd0323_xfer_ssi, oled);
pl022_init(0x40008000, pic[7], stellaris_ssi_bus_xfer, ssi_bus);
/* Make sure the select pin is high. */
qemu_irq_raise(gpio_out[GPIO_D][0]);
} else {
pl022_init(0x40008000, pic[7], NULL, NULL);
}