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ETRAX: Add a dummy tempsensor and correct the NAND flash model.

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Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6202 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
edgar_igl 2009-01-07 13:05:58 +00:00
parent 69b5cae1c0
commit 4a1e6beab6
1 changed files with 98 additions and 6 deletions
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104
hw/axis_dev88.c
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@ -84,12 +84,88 @@ static CPUWriteMemoryFunc *nand_write[] = {
&nand_writel,
};
#define RW_PA_DOUT 0
#define R_PA_DIN 1
#define RW_PA_OE 2
struct gpio_state_t
struct tempsensor_t
{
unsigned int shiftreg;
unsigned int count;
enum {
ST_OUT, ST_IN, ST_Z
} state;
uint16_t regs[3];
};
static void tempsensor_clkedge(struct tempsensor_t *s,
unsigned int clk, unsigned int data_in)
{
D(printf("%s clk=%d state=%d sr=%x\n", __func__,
clk, s->state, s->shiftreg));
if (s->count == 0) {
s->count = 16;
s->state = ST_OUT;
}
switch (s->state) {
case ST_OUT:
/* Output reg is clocked at negedge. */
if (!clk) {
s->count--;
s->shiftreg <<= 1;
if (s->count == 0) {
s->shiftreg = 0;
s->state = ST_IN;
s->count = 16;
}
}
break;
case ST_Z:
if (clk) {
s->count--;
if (s->count == 0) {
s->shiftreg = 0;
s->state = ST_OUT;
s->count = 16;
}
}
break;
case ST_IN:
/* Indata is sampled at posedge. */
if (clk) {
s->count--;
s->shiftreg <<= 1;
s->shiftreg |= data_in & 1;
if (s->count == 0) {
D(printf("%s cfgreg=%x\n", __func__, s->shiftreg));
s->regs[0] = s->shiftreg;
s->state = ST_OUT;
s->count = 16;
if ((s->regs[0] & 0xff) == 0) {
/* 25 degrees celcius. */
s->shiftreg = 0x0b9f;
} else if ((s->regs[0] & 0xff) == 0xff) {
/* Sensor ID, 0x8100 LM70. */
s->shiftreg = 0x8100;
} else
printf("Invalid tempsens state %x\n", s->regs[0]);
}
}
break;
}
}
#define RW_PA_DOUT 0x00
#define R_PA_DIN 0x01
#define RW_PA_OE 0x02
#define RW_PD_DOUT 0x10
#define R_PD_DIN 0x11
#define RW_PD_OE 0x12
static struct gpio_state_t
{
struct nand_state_t *nand;
struct tempsensor_t tempsensor;
uint32_t regs[0x5c / 4];
} gpio_state;
@ -107,6 +183,13 @@ static uint32_t gpio_readl (void *opaque, target_phys_addr_t addr)
/* Encode pins from the nand. */
r |= s->nand->rdy << 7;
break;
case R_PD_DIN:
r = s->regs[RW_PD_DOUT] & s->regs[RW_PD_OE];
/* Encode temp sensor pins. */
r |= (!!(s->tempsensor.shiftreg & 0x10000)) << 4;
break;
default:
r = s->regs[addr];
break;
@ -131,6 +214,15 @@ static void gpio_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
s->regs[addr] = value;
break;
case RW_PD_DOUT:
/* Temp sensor clk. */
if ((s->regs[addr] ^ value) & 2)
tempsensor_clkedge(&s->tempsensor, !!(value & 2),
!!(value & 16));
s->regs[addr] = value;
break;
default:
s->regs[addr] = value;
break;
@ -194,13 +286,13 @@ void axisdev88_init (ram_addr_t ram_size, int vga_ram_size,
/* Attach a NAND flash to CS1. */
nand_state.nand = nand_init(NAND_MFR_STMICRO, 0xf1);
nand_state.nand = nand_init(NAND_MFR_STMICRO, 0x39);
nand_regs = cpu_register_io_memory(0, nand_read, nand_write, &nand_state);
cpu_register_physical_memory(0x10000000, 0x05000000, nand_regs);
gpio_state.nand = &nand_state;
gpio_regs = cpu_register_io_memory(0, gpio_read, gpio_write, &gpio_state);
cpu_register_physical_memory(0x3001a000, 0x1c, gpio_regs);
cpu_register_physical_memory(0x3001a000, 0x5c, gpio_regs);
pic = etraxfs_pic_init(env, 0x3001c000);