diff options
Diffstat (limited to 'hw/escc.c')
| -rw-r--r-- | hw/escc.c | 145 |
1 files changed, 81 insertions, 64 deletions
@@ -1,5 +1,5 @@ /* - * QEMU Sparc SLAVIO serial port emulation + * QEMU ESCC (Z8030/Z8530/Z85C30/SCC/ESCC) serial port emulation * * Copyright (c) 2003-2005 Fabrice Bellard * @@ -22,7 +22,7 @@ * THE SOFTWARE. */ #include "hw.h" -#include "sun4m.h" +#include "escc.h" #include "qemu-char.h" #include "console.h" @@ -36,7 +36,7 @@ //#define DEBUG_MOUSE /* - * This is the serial port, mouse and keyboard part of chip STP2001 + * On Sparc32 this is the serial port, mouse and keyboard part of chip STP2001 * (Slave I/O), also produced as NCR89C105. See * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt * @@ -44,6 +44,14 @@ * mouse and keyboard ports don't implement all functions and they are * only asynchronous. There is no DMA. * + * Z85C30 is also used on PowerMacs. There are some small differences + * between Sparc version (sunzilog) and PowerMac (pmac): + * Offset between control and data registers + * There is some kind of lockup bug, but we can ignore it + * CTS is inverted + * DMA on pmac using DBDMA chip + * pmac can do IRDA and faster rates, sunzilog can only do 38400 + * pmac baud rate generator clock is 3.6864 MHz, sunzilog 4.9152 MHz */ /* @@ -102,13 +110,14 @@ typedef struct ChannelState { CharDriverState *chr; int e0_mode, led_mode, caps_lock_mode, num_lock_mode; int disabled; + int clock; } ChannelState; struct SerialState { struct ChannelState chn[2]; + int it_shift; }; -#define SERIAL_SIZE 8 #define SERIAL_CTRL 0 #define SERIAL_DATA 1 @@ -257,7 +266,7 @@ static uint32_t get_queue(void *opaque) return val; } -static int slavio_serial_update_irq_chn(ChannelState *s) +static int escc_update_irq_chn(ChannelState *s) { if ((((s->wregs[W_INTR] & INTR_TXINT) && s->txint == 1) || // tx ints enabled, pending @@ -271,18 +280,18 @@ static int slavio_serial_update_irq_chn(ChannelState *s) return 0; } -static void slavio_serial_update_irq(ChannelState *s) +static void escc_update_irq(ChannelState *s) { int irq; - irq = slavio_serial_update_irq_chn(s); - irq |= slavio_serial_update_irq_chn(s->otherchn); + irq = escc_update_irq_chn(s); + irq |= escc_update_irq_chn(s->otherchn); SER_DPRINTF("IRQ = %d\n", irq); qemu_set_irq(s->irq, irq); } -static void slavio_serial_reset_chn(ChannelState *s) +static void escc_reset_chn(ChannelState *s) { int i; @@ -311,11 +320,11 @@ static void slavio_serial_reset_chn(ChannelState *s) clear_queue(s); } -static void slavio_serial_reset(void *opaque) +static void escc_reset(void *opaque) { SerialState *s = opaque; - slavio_serial_reset_chn(&s->chn[0]); - slavio_serial_reset_chn(&s->chn[1]); + escc_reset_chn(&s->chn[0]); + escc_reset_chn(&s->chn[1]); } static inline void set_rxint(ChannelState *s) @@ -339,7 +348,7 @@ static inline void set_rxint(ChannelState *s) s->rregs[R_INTR] |= INTR_RXINTA; else s->otherchn->rregs[R_INTR] |= INTR_RXINTB; - slavio_serial_update_irq(s); + escc_update_irq(s); } static inline void set_txint(ChannelState *s) @@ -360,7 +369,7 @@ static inline void set_txint(ChannelState *s) s->rregs[R_INTR] |= INTR_TXINTA; else s->otherchn->rregs[R_INTR] |= INTR_TXINTB; - slavio_serial_update_irq(s); + escc_update_irq(s); } static inline void clr_rxint(ChannelState *s) @@ -382,7 +391,7 @@ static inline void clr_rxint(ChannelState *s) } if (s->txint) set_txint(s); - slavio_serial_update_irq(s); + escc_update_irq(s); } static inline void clr_txint(ChannelState *s) @@ -404,10 +413,10 @@ static inline void clr_txint(ChannelState *s) } if (s->rxint) set_rxint(s); - slavio_serial_update_irq(s); + escc_update_irq(s); } -static void slavio_serial_update_parameters(ChannelState *s) +static void escc_update_parameters(ChannelState *s) { int speed, parity, data_bits, stop_bits; QEMUSerialSetParams ssp; @@ -442,7 +451,7 @@ static void slavio_serial_update_parameters(ChannelState *s) data_bits = 8; break; } - speed = 2457600 / ((s->wregs[W_BRGLO] | (s->wregs[W_BRGHI] << 8)) + 2); + speed = s->clock / ((s->wregs[W_BRGLO] | (s->wregs[W_BRGHI] << 8)) + 2); switch (s->wregs[W_TXCTRL1] & TXCTRL1_CLKMSK) { case TXCTRL1_CLK1X: break; @@ -466,8 +475,7 @@ static void slavio_serial_update_parameters(ChannelState *s) qemu_chr_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_PARAMS, &ssp); } -static void slavio_serial_mem_writeb(void *opaque, target_phys_addr_t addr, - uint32_t val) +static void escc_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val) { SerialState *serial = opaque; ChannelState *s; @@ -475,8 +483,8 @@ static void slavio_serial_mem_writeb(void *opaque, target_phys_addr_t addr, int newreg, channel; val &= 0xff; - saddr = (addr & 3) >> 1; - channel = addr >> 2; + saddr = (addr >> serial->it_shift) & 1; + channel = (addr >> (serial->it_shift + 1)) & 1; s = &serial->chn[channel]; switch (saddr) { case SERIAL_CTRL: @@ -513,13 +521,13 @@ static void slavio_serial_mem_writeb(void *opaque, target_phys_addr_t addr, case W_TXCTRL1: case W_TXCTRL2: s->wregs[s->reg] = val; - slavio_serial_update_parameters(s); + escc_update_parameters(s); break; case W_BRGLO: case W_BRGHI: s->wregs[s->reg] = val; s->rregs[s->reg] = val; - slavio_serial_update_parameters(s); + escc_update_parameters(s); break; case W_MINTR: switch (val & MINTR_RST_MASK) { @@ -527,13 +535,13 @@ static void slavio_serial_mem_writeb(void *opaque, target_phys_addr_t addr, default: break; case MINTR_RST_B: - slavio_serial_reset_chn(&serial->chn[0]); + escc_reset_chn(&serial->chn[0]); return; case MINTR_RST_A: - slavio_serial_reset_chn(&serial->chn[1]); + escc_reset_chn(&serial->chn[1]); return; case MINTR_RST_ALL: - slavio_serial_reset(serial); + escc_reset(serial); return; } break; @@ -564,7 +572,7 @@ static void slavio_serial_mem_writeb(void *opaque, target_phys_addr_t addr, } } -static uint32_t slavio_serial_mem_readb(void *opaque, target_phys_addr_t addr) +static uint32_t escc_mem_readb(void *opaque, target_phys_addr_t addr) { SerialState *serial = opaque; ChannelState *s; @@ -572,8 +580,8 @@ static uint32_t slavio_serial_mem_readb(void *opaque, target_phys_addr_t addr) uint32_t ret; int channel; - saddr = (addr & 3) >> 1; - channel = addr >> 2; + saddr = (addr >> serial->it_shift) & 1; + channel = (addr >> (serial->it_shift + 1)) & 1; s = &serial->chn[channel]; switch (saddr) { case SERIAL_CTRL: @@ -624,7 +632,7 @@ static void serial_receive_byte(ChannelState *s, int ch) static void serial_receive_break(ChannelState *s) { s->rregs[R_STATUS] |= STATUS_BRK; - slavio_serial_update_irq(s); + escc_update_irq(s); } static void serial_receive1(void *opaque, const uint8_t *buf, int size) @@ -640,19 +648,19 @@ static void serial_event(void *opaque, int event) serial_receive_break(s); } -static CPUReadMemoryFunc *slavio_serial_mem_read[3] = { - slavio_serial_mem_readb, +static CPUReadMemoryFunc *escc_mem_read[3] = { + escc_mem_readb, NULL, NULL, }; -static CPUWriteMemoryFunc *slavio_serial_mem_write[3] = { - slavio_serial_mem_writeb, +static CPUWriteMemoryFunc *escc_mem_write[3] = { + escc_mem_writeb, NULL, NULL, }; -static void slavio_serial_save_chn(QEMUFile *f, ChannelState *s) +static void escc_save_chn(QEMUFile *f, ChannelState *s) { uint32_t tmp = 0; @@ -668,15 +676,15 @@ static void slavio_serial_save_chn(QEMUFile *f, ChannelState *s) qemu_put_buffer(f, s->rregs, SERIAL_REGS); } -static void slavio_serial_save(QEMUFile *f, void *opaque) +static void escc_save(QEMUFile *f, void *opaque) { SerialState *s = opaque; - slavio_serial_save_chn(f, &s->chn[0]); - slavio_serial_save_chn(f, &s->chn[1]); + escc_save_chn(f, &s->chn[0]); + escc_save_chn(f, &s->chn[1]); } -static int slavio_serial_load_chn(QEMUFile *f, ChannelState *s, int version_id) +static int escc_load_chn(QEMUFile *f, ChannelState *s, int version_id) { uint32_t tmp; @@ -698,34 +706,37 @@ static int slavio_serial_load_chn(QEMUFile *f, ChannelState *s, int version_id) return 0; } -static int slavio_serial_load(QEMUFile *f, void *opaque, int version_id) +static int escc_load(QEMUFile *f, void *opaque, int version_id) { SerialState *s = opaque; int ret; - ret = slavio_serial_load_chn(f, &s->chn[0], version_id); + ret = escc_load_chn(f, &s->chn[0], version_id); if (ret != 0) return ret; - ret = slavio_serial_load_chn(f, &s->chn[1], version_id); + ret = escc_load_chn(f, &s->chn[1], version_id); return ret; } -SerialState *slavio_serial_init(target_phys_addr_t base, qemu_irq irq, - CharDriverState *chr1, CharDriverState *chr2) +int escc_init(target_phys_addr_t base, qemu_irq irq, CharDriverState *chr1, + CharDriverState *chr2, int clock, int it_shift) { - int slavio_serial_io_memory, i; + int escc_io_memory, i; SerialState *s; s = qemu_mallocz(sizeof(SerialState)); if (!s) - return NULL; + return 0; - slavio_serial_io_memory = cpu_register_io_memory(0, slavio_serial_mem_read, - slavio_serial_mem_write, - s); - cpu_register_physical_memory(base, SERIAL_SIZE, slavio_serial_io_memory); + escc_io_memory = cpu_register_io_memory(0, escc_mem_read, + escc_mem_write, + s); + if (base) + cpu_register_physical_memory(base, ESCC_SIZE << it_shift, + escc_io_memory); + s->it_shift = it_shift; s->chn[0].chr = chr1; s->chn[1].chr = chr2; s->chn[0].disabled = 0; @@ -735,6 +746,7 @@ SerialState *slavio_serial_init(target_phys_addr_t base, qemu_irq irq, s->chn[i].irq = irq; s->chn[i].chn = 1 - i; s->chn[i].type = ser; + s->chn[i].clock = clock / 2; if (s->chn[i].chr) { qemu_chr_add_handlers(s->chn[i].chr, serial_can_receive, serial_receive1, serial_event, &s->chn[i]); @@ -742,11 +754,13 @@ SerialState *slavio_serial_init(target_phys_addr_t base, qemu_irq irq, } s->chn[0].otherchn = &s->chn[1]; s->chn[1].otherchn = &s->chn[0]; - register_savevm("slavio_serial", base, 2, slavio_serial_save, - slavio_serial_load, s); - qemu_register_reset(slavio_serial_reset, s); - slavio_serial_reset(s); - return s; + if (base) + register_savevm("escc", base, 2, escc_save, escc_load, s); + else + register_savevm("escc", -1, 2, escc_save, escc_load, s); + qemu_register_reset(escc_reset, s); + escc_reset(s); + return escc_io_memory; } static const uint8_t keycodes[128] = { @@ -887,7 +901,7 @@ static void sunmouse_event(void *opaque, } void slavio_serial_ms_kbd_init(target_phys_addr_t base, qemu_irq irq, - int disabled) + int disabled, int clock, int it_shift) { int slavio_serial_io_memory, i; SerialState *s; @@ -895,10 +909,13 @@ void slavio_serial_ms_kbd_init(target_phys_addr_t base, qemu_irq irq, s = qemu_mallocz(sizeof(SerialState)); if (!s) return; + + s->it_shift = it_shift; for (i = 0; i < 2; i++) { s->chn[i].irq = irq; s->chn[i].chn = 1 - i; s->chn[i].chr = NULL; + s->chn[i].clock = clock / 2; } s->chn[0].otherchn = &s->chn[1]; s->chn[1].otherchn = &s->chn[0]; @@ -907,16 +924,16 @@ void slavio_serial_ms_kbd_init(target_phys_addr_t base, qemu_irq irq, s->chn[0].disabled = disabled; s->chn[1].disabled = disabled; - slavio_serial_io_memory = cpu_register_io_memory(0, slavio_serial_mem_read, - slavio_serial_mem_write, + slavio_serial_io_memory = cpu_register_io_memory(0, escc_mem_read, + escc_mem_write, s); - cpu_register_physical_memory(base, SERIAL_SIZE, slavio_serial_io_memory); + cpu_register_physical_memory(base, ESCC_SIZE << it_shift, + slavio_serial_io_memory); qemu_add_mouse_event_handler(sunmouse_event, &s->chn[0], 0, "QEMU Sun Mouse"); qemu_add_kbd_event_handler(sunkbd_event, &s->chn[1]); - register_savevm("slavio_serial_mouse", base, 2, slavio_serial_save, - slavio_serial_load, s); - qemu_register_reset(slavio_serial_reset, s); - slavio_serial_reset(s); + register_savevm("slavio_serial_mouse", base, 2, escc_save, escc_load, s); + qemu_register_reset(escc_reset, s); + escc_reset(s); } |