tc6393xb.c
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/*
* Toshiba TC6393XB I/O Controller.
* Found in Sharp Zaurus SL-6000 (tosa) or some
* Toshiba e-Series PDAs.
*
* Most features are currently unsupported!!!
*
* This code is licensed under the GNU GPL v2.
*/
#include "hw.h"
#include "pxa.h"
#include "devices.h"
#define TC6393XB_GPIOS 16
#define SCR_REVID 0x08 /* b Revision ID */
#define SCR_ISR 0x50 /* b Interrupt Status */
#define SCR_IMR 0x52 /* b Interrupt Mask */
#define SCR_IRR 0x54 /* b Interrupt Routing */
#define SCR_GPER 0x60 /* w GP Enable */
#define SCR_GPI_SR(i) (0x64 + (i)) /* b3 GPI Status */
#define SCR_GPI_IMR(i) (0x68 + (i)) /* b3 GPI INT Mask */
#define SCR_GPI_EDER(i) (0x6c + (i)) /* b3 GPI Edge Detect Enable */
#define SCR_GPI_LIR(i) (0x70 + (i)) /* b3 GPI Level Invert */
#define SCR_GPO_DSR(i) (0x78 + (i)) /* b3 GPO Data Set */
#define SCR_GPO_DOECR(i) (0x7c + (i)) /* b3 GPO Data OE Control */
#define SCR_GP_IARCR(i) (0x80 + (i)) /* b3 GP Internal Active Register Control */
#define SCR_GP_IARLCR(i) (0x84 + (i)) /* b3 GP INTERNAL Active Register Level Control */
#define SCR_GPI_BCR(i) (0x88 + (i)) /* b3 GPI Buffer Control */
#define SCR_GPA_IARCR 0x8c /* w GPa Internal Active Register Control */
#define SCR_GPA_IARLCR 0x90 /* w GPa Internal Active Register Level Control */
#define SCR_GPA_BCR 0x94 /* w GPa Buffer Control */
#define SCR_CCR 0x98 /* w Clock Control */
#define SCR_PLL2CR 0x9a /* w PLL2 Control */
#define SCR_PLL1CR 0x9c /* l PLL1 Control */
#define SCR_DIARCR 0xa0 /* b Device Internal Active Register Control */
#define SCR_DBOCR 0xa1 /* b Device Buffer Off Control */
#define SCR_FER 0xe0 /* b Function Enable */
#define SCR_MCR 0xe4 /* w Mode Control */
#define SCR_CONFIG 0xfc /* b Configuration Control */
#define SCR_DEBUG 0xff /* b Debug */
struct tc6393xb_s {
target_phys_addr_t target_base;
struct {
uint8_t ISR;
uint8_t IMR;
uint8_t IRR;
uint16_t GPER;
uint8_t GPI_SR[3];
uint8_t GPI_IMR[3];
uint8_t GPI_EDER[3];
uint8_t GPI_LIR[3];
uint8_t GP_IARCR[3];
uint8_t GP_IARLCR[3];
uint8_t GPI_BCR[3];
uint16_t GPA_IARCR;
uint16_t GPA_IARLCR;
uint16_t CCR;
uint16_t PLL2CR;
uint32_t PLL1CR;
uint8_t DIARCR;
uint8_t DBOCR;
uint8_t FER;
uint16_t MCR;
uint8_t CONFIG;
uint8_t DEBUG;
} scr;
uint32_t gpio_dir;
uint32_t gpio_level;
uint32_t prev_level;
qemu_irq handler[TC6393XB_GPIOS];
qemu_irq *gpio_in;
};
qemu_irq *tc6393xb_gpio_in_get(struct tc6393xb_s *s)
{
return s->gpio_in;
}
static void tc6393xb_gpio_set(void *opaque, int line, int level)
{
// struct tc6393xb_s *s = opaque;
if (line > TC6393XB_GPIOS) {
printf("%s: No GPIO pin %i\n", __FUNCTION__, line);
return;
}
// FIXME: how does the chip reflect the GPIO input level change?
}
void tc6393xb_gpio_out_set(struct tc6393xb_s *s, int line,
qemu_irq handler)
{
if (line >= TC6393XB_GPIOS) {
fprintf(stderr, "TC6393xb: no GPIO pin %d\n", line);
return;
}
s->handler[line] = handler;
}
static void tc6393xb_gpio_handler_update(struct tc6393xb_s *s)
{
uint32_t level, diff;
int bit;
level = s->gpio_level & s->gpio_dir;
for (diff = s->prev_level ^ level; diff; diff ^= 1 << bit) {
bit = ffs(diff) - 1;
qemu_set_irq(s->handler[bit], (level >> bit) & 1);
}
s->prev_level = level;
}
#define SCR_REG_B(N) \
case SCR_ ##N: return s->scr.N
#define SCR_REG_W(N) \
case SCR_ ##N: return s->scr.N; \
case SCR_ ##N + 1: return s->scr.N >> 8;
#define SCR_REG_L(N) \
case SCR_ ##N: return s->scr.N; \
case SCR_ ##N + 1: return s->scr.N >> 8; \
case SCR_ ##N + 2: return s->scr.N >> 16; \
case SCR_ ##N + 3: return s->scr.N >> 24;
#define SCR_REG_A(N) \
case SCR_ ##N(0): return s->scr.N[0]; \
case SCR_ ##N(1): return s->scr.N[1]; \
case SCR_ ##N(2): return s->scr.N[2]
static uint32_t tc6393xb_readb(void *opaque, target_phys_addr_t addr)
{
struct tc6393xb_s *s = opaque;
addr -= s->target_base;
switch (addr) {
case SCR_REVID:
return 3;
case SCR_REVID+1:
return 0;
SCR_REG_B(ISR);
SCR_REG_B(IMR);
SCR_REG_B(IRR);
SCR_REG_W(GPER);
SCR_REG_A(GPI_SR);
SCR_REG_A(GPI_IMR);
SCR_REG_A(GPI_EDER);
SCR_REG_A(GPI_LIR);
case SCR_GPO_DSR(0):
case SCR_GPO_DSR(1):
case SCR_GPO_DSR(2):
return (s->gpio_level >> ((addr - SCR_GPO_DSR(0)) * 8)) & 0xff;
case SCR_GPO_DOECR(0):
case SCR_GPO_DOECR(1):
case SCR_GPO_DOECR(2):
return (s->gpio_dir >> ((addr - SCR_GPO_DOECR(0)) * 8)) & 0xff;
SCR_REG_A(GP_IARCR);
SCR_REG_A(GP_IARLCR);
SCR_REG_A(GPI_BCR);
SCR_REG_W(GPA_IARCR);
SCR_REG_W(GPA_IARLCR);
SCR_REG_W(CCR);
SCR_REG_W(PLL2CR);
SCR_REG_L(PLL1CR);
SCR_REG_B(DIARCR);
SCR_REG_B(DBOCR);
SCR_REG_B(FER);
SCR_REG_W(MCR);
SCR_REG_B(CONFIG);
SCR_REG_B(DEBUG);
}
fprintf(stderr, "tc6393xb: unhandled read at %08x\n", (uint32_t) addr);
return 0;
}
#undef SCR_REG_B
#undef SCR_REG_W
#undef SCR_REG_L
#undef SCR_REG_A
#define SCR_REG_B(N) \
case SCR_ ##N: s->scr.N = value; break;
#define SCR_REG_W(N) \
case SCR_ ##N: s->scr.N = (s->scr.N & ~0xff) | (value & 0xff); break; \
case SCR_ ##N + 1: s->scr.N = (s->scr.N & 0xff) | (value << 8); break
#define SCR_REG_L(N) \
case SCR_ ##N: s->scr.N = (s->scr.N & ~0xff) | (value & 0xff); break; \
case SCR_ ##N + 1: s->scr.N = (s->scr.N & ~(0xff << 8)) | (value & (0xff << 8)); break; \
case SCR_ ##N + 2: s->scr.N = (s->scr.N & ~(0xff << 16)) | (value & (0xff << 16)); break; \
case SCR_ ##N + 3: s->scr.N = (s->scr.N & ~(0xff << 24)) | (value & (0xff << 24)); break;
#define SCR_REG_A(N) \
case SCR_ ##N(0): s->scr.N[0] = value; break; \
case SCR_ ##N(1): s->scr.N[1] = value; break; \
case SCR_ ##N(2): s->scr.N[2] = value; break
static void tc6393xb_writeb(void *opaque, target_phys_addr_t addr, uint32_t value)
{
struct tc6393xb_s *s = opaque;
addr -= s->target_base;
switch (addr) {
SCR_REG_B(ISR);
SCR_REG_B(IMR);
SCR_REG_B(IRR);
SCR_REG_W(GPER);
SCR_REG_A(GPI_SR);
SCR_REG_A(GPI_IMR);
SCR_REG_A(GPI_EDER);
SCR_REG_A(GPI_LIR);
case SCR_GPO_DSR(0):
case SCR_GPO_DSR(1):
case SCR_GPO_DSR(2):
s->gpio_level = (s->gpio_level & ~(0xff << ((addr - SCR_GPO_DSR(0))*8))) | ((value & 0xff) << ((addr - SCR_GPO_DSR(0))*8));
tc6393xb_gpio_handler_update(s);
break;
case SCR_GPO_DOECR(0):
case SCR_GPO_DOECR(1):
case SCR_GPO_DOECR(2):
s->gpio_dir = (s->gpio_dir & ~(0xff << ((addr - SCR_GPO_DOECR(0))*8))) | ((value & 0xff) << ((addr - SCR_GPO_DOECR(0))*8));
tc6393xb_gpio_handler_update(s);
break;
SCR_REG_A(GP_IARCR);
SCR_REG_A(GP_IARLCR);
SCR_REG_A(GPI_BCR);
SCR_REG_W(GPA_IARCR);
SCR_REG_W(GPA_IARLCR);
SCR_REG_W(CCR);
SCR_REG_W(PLL2CR);
SCR_REG_L(PLL1CR);
SCR_REG_B(DIARCR);
SCR_REG_B(DBOCR);
SCR_REG_B(FER);
SCR_REG_W(MCR);
SCR_REG_B(CONFIG);
SCR_REG_B(DEBUG);
default:
fprintf(stderr, "tc6393xb: unhandled write at %08x: %02x\n",
(uint32_t) addr, value & 0xff);
break;
}
}
#undef SCR_REG_B
#undef SCR_REG_W
#undef SCR_REG_L
#undef SCR_REG_A
static uint32_t tc6393xb_readw(void *opaque, target_phys_addr_t addr)
{
return (tc6393xb_readb(opaque, addr) & 0xff) |
(tc6393xb_readb(opaque, addr + 1) << 8);
}
static uint32_t tc6393xb_readl(void *opaque, target_phys_addr_t addr)
{
return (tc6393xb_readb(opaque, addr) & 0xff) |
((tc6393xb_readb(opaque, addr + 1) & 0xff) << 8) |
((tc6393xb_readb(opaque, addr + 2) & 0xff) << 16) |
((tc6393xb_readb(opaque, addr + 3) & 0xff) << 24);
}
static void tc6393xb_writew(void *opaque, target_phys_addr_t addr, uint32_t value)
{
tc6393xb_writeb(opaque, addr, value);
tc6393xb_writeb(opaque, addr + 1, value >> 8);
}
static void tc6393xb_writel(void *opaque, target_phys_addr_t addr, uint32_t value)
{
tc6393xb_writeb(opaque, addr, value);
tc6393xb_writeb(opaque, addr + 1, value >> 8);
tc6393xb_writeb(opaque, addr + 2, value >> 16);
tc6393xb_writeb(opaque, addr + 3, value >> 24);
}
struct tc6393xb_s *tc6393xb_init(uint32_t base, qemu_irq irq)
{
int iomemtype;
struct tc6393xb_s *s;
CPUReadMemoryFunc *tc6393xb_readfn[] = {
tc6393xb_readb,
tc6393xb_readw,
tc6393xb_readl,
};
CPUWriteMemoryFunc *tc6393xb_writefn[] = {
tc6393xb_writeb,
tc6393xb_writew,
tc6393xb_writel,
};
s = (struct tc6393xb_s *) qemu_mallocz(sizeof(struct tc6393xb_s));
s->target_base = base;
s->gpio_in = qemu_allocate_irqs(tc6393xb_gpio_set, s, TC6393XB_GPIOS);
iomemtype = cpu_register_io_memory(0, tc6393xb_readfn,
tc6393xb_writefn, s);
cpu_register_physical_memory(s->target_base, 0x200000, iomemtype);
return s;
}