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Re: [Qemu-devel] [PATCH v3 03/14] ARM: exynos4210: UART support
|
From: |
Peter Maydell |
|
Subject: |
Re: [Qemu-devel] [PATCH v3 03/14] ARM: exynos4210: UART support |
|
Date: |
Mon, 12 Dec 2011 22:55:56 +0000 |
On 12 December 2011 06:43, Evgeny Voevodin <address@hidden> wrote:
> From: Maksim Kozlov <address@hidden>
>
> Add basic support of exynos4210 UART
>
> Conflicts:
>
> Makefile.target
Don't leave git's conflicts notes in the commit logs :-)
>
> Signed-off-by: Evgeny Voevodin <address@hidden>
> ---
> Makefile.target | 2 +-
> hw/exynos4210.c | 51 ++++
> hw/exynos4210.h | 9 +
> hw/exynos4210_uart.c | 674
> ++++++++++++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 735 insertions(+), 1 deletions(-)
> create mode 100644 hw/exynos4210_uart.c
>
> diff --git a/Makefile.target b/Makefile.target
> index ce4f1f8..4c706b1 100644
> --- a/Makefile.target
> +++ b/Makefile.target
> @@ -344,7 +344,7 @@ obj-arm-y = integratorcp.o versatilepb.o arm_pic.o
> arm_timer.o
> obj-arm-y += arm_boot.o pl011.o pl031.o pl050.o pl080.o pl110.o pl181.o
> pl190.o
> obj-arm-y += versatile_pci.o
> obj-arm-y += realview_gic.o realview.o arm_sysctl.o arm11mpcore.o a9mpcore.o
> -obj-arm-y += exynos4210.o exynos4210_cmu.o
> +obj-arm-y += exynos4210.o exynos4210_cmu.o exynos4210_uart.o
> obj-arm-y += armv7m.o armv7m_nvic.o stellaris.o pl022.o stellaris_enet.o
> obj-arm-y += pl061.o
> obj-arm-y += arm-semi.o
> diff --git a/hw/exynos4210.c b/hw/exynos4210.c
> index 1a6e353..d5a1fe0 100644
> --- a/hw/exynos4210.c
> +++ b/hw/exynos4210.c
> @@ -63,6 +63,18 @@
> /* SFR Base Address for CMUs */
> #define EXYNOS4210_CMU_BASE_ADDR 0x10030000
>
> +/* UART's definitions */
> +#define EXYNOS4210_UART_BASE_ADDR 0x13800000
> +#define EXYNOS4210_UART_SHIFT 0x00010000
> +
> +#define EXYNOS4210_UARTS_NUMBER 4
> +
> +#define EXYNOS4210_UART_CHANNEL(addr) ((addr >> 16) & 0x7)
> +#define EXYNOS4210_UART0_FIFO_SIZE 256
> +#define EXYNOS4210_UART1_FIFO_SIZE 64
> +#define EXYNOS4210_UART2_FIFO_SIZE 16
> +#define EXYNOS4210_UART3_FIFO_SIZE 16
> +
>
> static struct arm_boot_info exynos4210_binfo = {
> .loader_start = EXYNOS4210_BASE_BOOT_ADDR,
> @@ -179,6 +191,45 @@ static void exynos4210_init(ram_addr_t ram_size,
> /* CMU */
> sysbus_create_simple("exynos4210.cmu", EXYNOS4210_CMU_BASE_ADDR, NULL);
>
> + /*** UARTs ***/
> + for (n = 0; n < EXYNOS4210_UARTS_NUMBER; n++) {
> +
> + uint32_t addr = EXYNOS4210_UART_BASE_ADDR + EXYNOS4210_UART_SHIFT *
> n;
> + int channel = EXYNOS4210_UART_CHANNEL(addr);
Is there any case where channel is not the same as n ?
> + qemu_irq uart_irq;
> + int fifo_size = 0;
> +
> + switch (channel) {
> + case 0:
> + fifo_size = EXYNOS4210_UART0_FIFO_SIZE;
> + break;
> + case 1:
> + fifo_size = EXYNOS4210_UART1_FIFO_SIZE;
> + break;
> + case 2:
> + fifo_size = EXYNOS4210_UART2_FIFO_SIZE;
> + break;
> + case 3:
> + fifo_size = EXYNOS4210_UART3_FIFO_SIZE;
> + break;
> + default:
> + fifo_size = 0;
> + PRINT_DEBUG("Wrong channel number: %d\n", channel);
> + break;
> + }
> +
> + if (fifo_size == 0) {
> + PRINT_DEBUG("Can't create UART%d with fifo size %d\n",
> + channel, fifo_size);
> + continue;
> + }
> +
> + uart_irq = NULL;
> +
> + exynos4210_uart_create(addr, fifo_size, channel, NULL, uart_irq);
> + }
> +
> +
> /*** Load kernel ***/
>
> exynos4210_binfo.ram_size = ram_size;
> diff --git a/hw/exynos4210.h b/hw/exynos4210.h
> index 683a4a6..3df7322 100644
> --- a/hw/exynos4210.h
> +++ b/hw/exynos4210.h
> @@ -53,4 +53,13 @@ typedef enum {
>
> uint64_t exynos4210_cmu_get_rate(Exynos4210CmuClock clock);
>
> +/*
> + * exynos4210 UART
> + */
> +DeviceState *exynos4210_uart_create(target_phys_addr_t addr,
> + int fifo_size,
> + int channel,
> + CharDriverState *chr,
> + qemu_irq irq);
> +
> #endif /* EXYNOS4210_H_ */
> diff --git a/hw/exynos4210_uart.c b/hw/exynos4210_uart.c
> new file mode 100644
> index 0000000..22c24b7
> --- /dev/null
> +++ b/hw/exynos4210_uart.c
> @@ -0,0 +1,674 @@
> +/*
> + * exynos4210 UART Emulation
> + *
> + * Copyright (C) 2011 Samsung Electronics Co Ltd.
> + * Maksim Kozlov, <address@hidden>
> + *
> + * Created on: 07.2011
> + *
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful, but
> WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
> + * for more details.
> + *
> + * You should have received a copy of the GNU General Public License along
> + * with this program; if not, write to the Free Software Foundation, Inc.,
> 51
> + * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
> + *
> + */
> +
> +#include "sysbus.h"
> +#include "sysemu.h"
> +#include "qemu-char.h"
> +
> +#include "exynos4210.h"
> +
> +#undef DEBUG_UART
> +#undef DEBUG_UART_EXTEND
> +#undef DEBUG_IRQ
> +#undef DEBUG_Rx_DATA
> +#undef DEBUG_Tx_DATA
> +
> +
> +//#define DEBUG_UART
> +//#define DEBUG_UART_EXTEND
> +//#define DEBUG_IRQ
> +//#define DEBUG_Rx_DATA
> +//#define DEBUG_Tx_DATA
> +
> +
> +#define PRINT_DEBUG(fmt, args...) \
> + do {} while (0)
> +#define PRINT_DEBUG_EXTEND(fmt, args...) \
> + do {} while (0)
> +#define PRINT_ERROR(fmt, args...) \
> + do { \
> + fprintf(stderr, " [%s:%d] "fmt, __func__, __LINE__, ##args); \
> + } while (0)
> +
> +#ifdef DEBUG_UART
> +
> +#undef PRINT_DEBUG
> +#define PRINT_DEBUG(fmt, args...) \
> + do { \
> + fprintf(stderr, " [%s:%d] "fmt, __func__, __LINE__, ##args); \
> + } while (0)
> +
> +#ifdef DEBUG_UART_EXTEND
> +
> +#undef PRINT_DEBUG_EXTEND
> +#define PRINT_DEBUG_EXTEND(fmt, args...) \
> + do { \
> + fprintf(stderr, " [%s:%d] "fmt, __func__, __LINE__, ##args); \
> + } while (0)
> +
> +#endif /* EXTEND */
> +#endif
> +
> +
> +/*
> + * Offsets for UART registers relative to SFR base address
> + * for UARTn
> + *
> + */
> +#define ULCON 0x0000 /* Line Control */
> +#define UCON 0x0004 /* Control */
> +#define UFCON 0x0008 /* FIFO Control */
> +#define UMCON 0x000C /* Modem Control */
> +#define UTRSTAT 0x0010 /* Tx/Rx Status */
> +#define UERSTAT 0x0014 /* Rx Error Status */
> +#define UFSTAT 0x0018 /* FIFO Status */
> +#define UMSTAT 0x001C /* Modem Status */
> +#define UTXH 0x0020 /* Transmit Buffer */
> +#define URXH 0x0024 /* Receive Buffer */
> +#define UBRDIV 0x0028 /* Baud Rate Divisor */
> +#define UFRACVAL 0x002C /* Divisor Fractional Value */
> +#define UINTP 0x0030 /* Interrupt Pending */
> +#define UINTSP 0x0034 /* Interrupt Source Pending */
> +#define UINTM 0x0038 /* Interrupt Mask */
> +
> +/*
> + * for indexing register in the uint32_t array
> + *
> + * 'reg' - register offset (see offsets definitions above)
> + *
> + */
> +#define I_(reg) (reg / sizeof(uint32_t))
> +
> +typedef struct Exynos4210UartReg {
> + const char *name; /* the only reason is the debug output */
> + target_phys_addr_t offset;
> + uint32_t reset_value;
> +} Exynos4210UartReg;
> +
> +static Exynos4210UartReg exynos4210_uart_regs[] = {
> + {"ULCON" , ULCON , 0x00000000},
> + {"UCON" , UCON , 0x00003000},
> + {"UFCON" , UFCON , 0x00000000},
> + {"UMCON" , UMCON , 0x00000000},
> + {"UTRSTAT" , UTRSTAT , 0x00000006}, /* RO */
> + {"UERSTAT" , UERSTAT , 0x00000000}, /* RO */
> + {"UFSTAT" , UFSTAT , 0x00000000}, /* RO */
> + {"UMSTAT" , UMSTAT , 0x00000000}, /* RO */
> + {"UTXH" , UTXH , 0x5c5c5c5c}, /* WO, undefined reset value*/
> + {"URXH" , URXH , 0x00000000}, /* RO */
> + {"UBRDIV" , UBRDIV , 0x00000000},
> + {"UFRACVAL", UFRACVAL, 0x00000000},
> + {"UINTP" , UINTP , 0x00000000},
> + {"UINTSP" , UINTSP , 0x00000000},
> + {"UINTM" , UINTM , 0x00000000},
> +};
> +
> +#define EXYNOS4210_UART_REGS_MEM_SIZE 0x3c
> +
> +/* UART FIFO Control */
> +#define UFCON_FIFO_ENABLE 0x1
> +#define UFCON_Rx_FIFO_RESET 0x2
> +#define UFCON_Tx_FIFO_RESET 0x4
> +#define UFCON_Tx_FIFO_TRIGGER_LEVEL_SHIFT 8
> +#define UFCON_Tx_FIFO_TRIGGER_LEVEL \
> + (7 << UFCON_Tx_FIFO_TRIGGER_LEVEL_SHIFT)
> +#define UFCON_Rx_FIFO_TRIGGER_LEVEL_SHIFT 4
> +#define UFCON_Rx_FIFO_TRIGGER_LEVEL \
> + (7 << UFCON_Rx_FIFO_TRIGGER_LEVEL_SHIFT)
> +
> +/* Uart FIFO Status */
> +#define UFSTAT_Rx_FIFO_COUNT 0xff
> +#define UFSTAT_Rx_FIFO_FULL 0x100
> +#define UFSTAT_Rx_FIFO_ERROR 0x200
> +#define UFSTAT_Tx_FIFO_COUNT_SHIFT 16
> +#define UFSTAT_Tx_FIFO_COUNT (0xff << UFSTAT_Tx_FIFO_COUNT_SHIFT)
> +#define UFSTAT_Tx_FIFO_FULL_SHIFT 24
> +#define UFSTAT_Tx_FIFO_FULL (1 << UFSTAT_Tx_FIFO_FULL_SHIFT)
> +
> +/* UART Interrupt Source Pending */
> +#define UINTSP_RXD 0x1 /* Receive interrupt */
> +#define UINTSP_ERROR 0x2 /* Error interrupt */
> +#define UINTSP_TXD 0x4 /* Transmit interrupt */
> +#define UINTSP_MODEM 0x8 /* Modem interrupt */
> +
> +/* UART Line Control */
> +#define ULCON_IR_MODE_SHIFT 6
> +#define ULCON_PARITY_SHIFT 3
> +#define ULCON_STOP_BIT_SHIFT 1
> +
> +
> +
> +/* Specifies Tx/Rx Status */
> +#define UTRSTAT_TRANSMITTER_EMPTY 0x4
> +#define UTRSTAT_Tx_BUFFER_EMPTY 0x2
> +#define UTRSTAT_Rx_BUFFER_DATA_READY 0x1
> +
> +typedef struct {
> + uint8_t *data;
> + uint32_t sp, rp; /* store and retrieve pointers */
> + uint32_t size;
> +} Exynos4210UartFIFO;
> +
> +typedef struct {
> + SysBusDevice busdev;
> + MemoryRegion iomem;
> +
> + uint32_t reg[EXYNOS4210_UART_REGS_MEM_SIZE];
> + Exynos4210UartFIFO rx;
> + Exynos4210UartFIFO tx;
> +
> + CharDriverState *chr;
> + qemu_irq irq;
> +
> + uint32_t channel;
> +
> +} Exynos4210UartState;
> +
> +
> +#ifdef DEBUG_UART
> +/* The only meaning of life - debugging. This functions should be only used
> + * inside PRINT_DEBUG_... macroses
> + */
> +static const char *exynos4210_uart_regname(target_phys_addr_t offset)
> +{
> +
> + int regs_number = sizeof(exynos4210_uart_regs)/sizeof(Exynos4210UartReg);
> + int i;
> +
> + for (i = 0; i < regs_number; i++) {
> + if (offset == exynos4210_uart_regs[i].offset) {
> + return exynos4210_uart_regs[i].name;
> + }
> + }
> +
> + return NULL;
> +}
> +#endif
> +
> +
> +static void fifo_store(Exynos4210UartFIFO *q, uint8_t ch)
> +{
> + q->data[q->sp] = ch;
> + q->sp = (q->sp + 1) % q->size;
> +}
> +
> +static uint8_t fifo_retrieve(Exynos4210UartFIFO *q)
> +{
> + uint8_t ret = q->data[q->rp];
> + q->rp = (q->rp + 1) % q->size;
> + return ret;
> +}
> +
> +static int fifo_elements_number(Exynos4210UartFIFO *q)
> +{
> + if (q->sp < q->rp) {
> + return q->size - q->rp + q->sp;
> + }
> +
> + return q->sp - q->rp;
> +}
> +
> +static int fifo_empty_elements_number(Exynos4210UartFIFO *q)
> +{
> + return q->size - fifo_elements_number(q);
> +}
> +
> +static void fifo_reset(Exynos4210UartFIFO *q)
> +{
> + if (q->data != NULL) {
> + g_free(q->data);
> + q->data = NULL;
> + }
> +
> + q->data = (uint8_t *)g_malloc0(q->size);
> +
> + q->sp = 0;
> + q->rp = 0;
> +}
> +
> +static uint32_t exynos4210_uart_Tx_FIFO_trigger_level(Exynos4210UartState *s)
> +{
> + uint32_t level = 0;
> + uint32_t reg;
> +
> + reg = (s->reg[I_(UFCON)] && UFCON_Tx_FIFO_TRIGGER_LEVEL) >>
> + UFCON_Tx_FIFO_TRIGGER_LEVEL_SHIFT;
> +
> + switch (s->channel) {
> + case 0:
> + level = reg * 32;
> + break;
> + case 1:
> + case 4:
> + level = reg * 8;
> + break;
> + case 2:
> + case 3:
> + level = reg * 2;
> + break;
> + default:
> + level = 0;
> + PRINT_ERROR("Wrong UART chennel number: %d\n", s->channel);
> + }
> +
> + return level;
> +}
> +
> +static void exynos4210_uart_update_irq(Exynos4210UartState *s)
> +{
> + /*
> + * The Tx interrupt is always requested if the number of data in the
> + * transmit FIFO is smaller than the trigger level.
> + */
> + if (s->reg[I_(UFCON)] && UFCON_FIFO_ENABLE) {
> +
> + uint32_t count = (s->reg[I_(UFSTAT)] && UFSTAT_Tx_FIFO_COUNT) >>
> + UFSTAT_Tx_FIFO_COUNT_SHIFT;
> +
> + if (count <= exynos4210_uart_Tx_FIFO_trigger_level(s)) {
> + s->reg[I_(UINTSP)] |= UINTSP_TXD;
> + }
> + }
> +
> + s->reg[I_(UINTP)] = s->reg[I_(UINTSP)] & ~s->reg[I_(UINTM)];
> +
> + if (s->reg[I_(UINTP)]) {
> + qemu_irq_raise(s->irq);
> +
> +#ifdef DEBUG_IRQ
> + fprintf(stderr, "UART%d: IRQ have been raised: %08x\n",
> + s->channel, s->reg[I_(UINTP)]);
> +#endif
> +
> + } else {
> + qemu_irq_lower(s->irq);
> + }
> +}
> +
> +static void exynos4210_uart_update_parameters(Exynos4210UartState *s)
> +{
> + int speed, parity, data_bits, stop_bits, frame_size;
> + QEMUSerialSetParams ssp;
> + uint64_t uclk_rate;
> +
> + if (s->reg[I_(UBRDIV)] == 0) {
> + return;
> + }
> +
> + frame_size = 1; /* start bit */
> + if (s->reg[I_(ULCON)] & 0x20) {
> + frame_size++; /* parity bit */
> + if (s->reg[I_(ULCON)] & 0x28) {
> + parity = 'E';
> + } else {
> + parity = 'O';
> + }
> + } else {
> + parity = 'N';
> + }
> +
> + if (s->reg[I_(ULCON)] & 0x4) {
> + stop_bits = 2;
> + } else {
> + stop_bits = 1;
> + }
> +
> + data_bits = (s->reg[I_(ULCON)] & 0x3) + 5;
> +
> + frame_size += data_bits + stop_bits;
> +
> + switch (s->channel) {
> + case 0:
> + uclk_rate = exynos4210_cmu_get_rate(SCLK_UART0); break;
> + case 1:
> + uclk_rate = exynos4210_cmu_get_rate(SCLK_UART1); break;
> + case 2:
> + uclk_rate = exynos4210_cmu_get_rate(SCLK_UART2); break;
> + case 3:
> + uclk_rate = exynos4210_cmu_get_rate(SCLK_UART3); break;
> + case 4:
> + uclk_rate = exynos4210_cmu_get_rate(SCLK_UART4); break;
> + default:
> + hw_error("%s: Incorrect UART channel: %d\n",
> + __func__, s->channel);
> + }
> +
> + speed = uclk_rate / ((16 * (s->reg[I_(UBRDIV)]) & 0xffff) +
> + (s->reg[I_(UFRACVAL)] & 0x7) + 16);
> +
> + ssp.speed = speed;
> + ssp.parity = parity;
> + ssp.data_bits = data_bits;
> + ssp.stop_bits = stop_bits;
> +
> + qemu_chr_fe_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_PARAMS, &ssp);
> +
> + PRINT_DEBUG("UART%d: speed: %d, parity: %c, data: %d, stop: %d\n",
> + s->channel, speed, parity, data_bits, stop_bits);
> +}
> +
> +static void exynos4210_uart_write(void *opaque, target_phys_addr_t offset,
> + uint64_t val, unsigned size)
> +{
> + Exynos4210UartState *s = (Exynos4210UartState *)opaque;
> + uint8_t ch;
> +
> + if (offset > (EXYNOS4210_UART_REGS_MEM_SIZE - sizeof(uint32_t))) {
> + hw_error("exynos4210_cmu_write: Bad offset 0x%x\n", (int)offset);
> + }
> +
> + PRINT_DEBUG_EXTEND("UART%d: <0x%04x> %s <- 0x%08llx\n",
> + s->channel, offset, exynos4210_uart_regname(offset), val);
> +
> + switch (offset) {
> + case ULCON:
> + case UBRDIV:
> + case UFRACVAL:
> + s->reg[I_(offset)] = val;
> + exynos4210_uart_update_parameters(s);
> + break;
> + case UFCON:
> + s->reg[I_(UFCON)] = val;
> + if (val & UFCON_Rx_FIFO_RESET) {
> + fifo_reset(&s->rx);
> + s->reg[I_(UFCON)] &= ~UFCON_Rx_FIFO_RESET;
> + PRINT_DEBUG("UART%d: Rx FIFO Reset\n", s->channel);
> + }
> + if (val & UFCON_Tx_FIFO_RESET) {
> + fifo_reset(&s->tx);
> + s->reg[I_(UFCON)] &= ~UFCON_Tx_FIFO_RESET;
> + PRINT_DEBUG("UART%d: Tx FIFO Reset\n", s->channel);
> + }
> + break;
> +
> + case UTXH:
> + if (s->chr) {
> + s->reg[I_(UTRSTAT)] &= ~(UTRSTAT_TRANSMITTER_EMPTY |
> + UTRSTAT_Tx_BUFFER_EMPTY);
> + ch = (uint8_t)val;
> + qemu_chr_fe_write(s->chr, &ch, 1);
> +#ifdef DEBUG_Tx_DATA
> + fprintf(stderr, "%c", ch);
> +#endif
> + s->reg[I_(UTRSTAT)] |= UTRSTAT_TRANSMITTER_EMPTY |
> + UTRSTAT_Tx_BUFFER_EMPTY;
> + s->reg[I_(UINTSP)] |= UINTSP_TXD;
> + exynos4210_uart_update_irq(s);
> + }
> + break;
> +
> + case UINTP:
> + s->reg[I_(UINTP)] &= ~val;
> + /* XXX: It's the assumption that it works in this way */
> + s->reg[I_(UINTSP)] &= ~val;
> + PRINT_DEBUG("UART%d: UINTP [%04x] have been cleared: %08x\n",
> + s->channel, offset, s->reg[I_(UINTP)]);
> + exynos4210_uart_update_irq(s);
> + break;
> + case UTRSTAT:
> + case UERSTAT:
> + case UFSTAT:
> + case UMSTAT:
> + case URXH:
> + PRINT_DEBUG("UART%d: Trying to write into RO register: %s [%04x]\n",
> + s->channel, exynos4210_uart_regname(offset), offset);
> + break;
> + case UINTSP:
> + /* XXX: It's the assumption that it works in this way */
> + s->reg[I_(UINTSP)] &= ~val;
> + break;
> + case UINTM:
> + s->reg[I_(UINTM)] = val;
> + exynos4210_uart_update_irq(s);
> + break;
> + case UCON:
> + case UMCON:
> + default:
> + s->reg[I_(offset)] = val;
> + break;
> + }
> +}
> +static uint64_t exynos4210_uart_read(void *opaque, target_phys_addr_t offset,
> + unsigned size)
> +{
> + Exynos4210UartState *s = (Exynos4210UartState *)opaque;
> + uint32_t res;
> +
> + if (offset > (EXYNOS4210_UART_REGS_MEM_SIZE - sizeof(uint32_t))) {
> + hw_error("exynos4210_cmu_read: Bad offset 0x%x\n", (int)offset);
> + }
> +
> + switch (offset) {
> + case UERSTAT: /* Read Only */
> + res = s->reg[I_(UERSTAT)];
> + s->reg[I_(UERSTAT)] = 0;
> + return res;
> + case UFSTAT: /* Read Only */
> + s->reg[I_(UFSTAT)] = fifo_elements_number(&s->rx) & 0xff;
> + if (fifo_empty_elements_number(&s->rx) == 0) {
> + s->reg[I_(UFSTAT)] |= UFSTAT_Rx_FIFO_FULL;
> + s->reg[I_(UFSTAT)] &= ~0xff;
> + }
> + return s->reg[I_(UFSTAT)];
> + case URXH:
> + if (s->reg[I_(UFCON)] & UFCON_FIFO_ENABLE) {
> + if (fifo_elements_number(&s->rx)) {
> + res = fifo_retrieve(&s->rx);
> +#ifdef DEBUG_Rx_DATA
> + fprintf(stderr, "%c", res);
> +#endif
> + if (!fifo_elements_number(&s->rx)) {
> + s->reg[I_(UTRSTAT)] &= ~UTRSTAT_Rx_BUFFER_DATA_READY;
> + } else {
> + s->reg[I_(UTRSTAT)] |= UTRSTAT_Rx_BUFFER_DATA_READY;
> + }
> + } else {
> + s->reg[I_(UINTSP)] |= UINTSP_ERROR;
> + exynos4210_uart_update_irq(s);
> + res = 0;
> + }
> + } else {
> + s->reg[I_(UTRSTAT)] &= ~UTRSTAT_Rx_BUFFER_DATA_READY;
> + res = s->reg[I_(URXH)];
> + }
> + return res;
> + case UTXH:
> + PRINT_DEBUG("UART%d: Trying to read from WO register: %s [%04x]\n",
> + s->channel, exynos4210_uart_regname(offset), offset);
> + break;
> + default:
> + return s->reg[I_(offset)];
> + break;
> + }
> +
> + return 0;
> +}
> +
> +
> +static const MemoryRegionOps exynos4210_uart_ops = {
> + .read = exynos4210_uart_read,
> + .write = exynos4210_uart_write,
> + .endianness = DEVICE_NATIVE_ENDIAN,
> +};
> +
> +static int exynos4210_uart_can_receive(void *opaque)
> +{
> + Exynos4210UartState *s = (Exynos4210UartState *)opaque;
> +
> + return fifo_empty_elements_number(&s->rx);
> +}
> +
> +
> +static void exynos4210_uart_receive(void *opaque, const uint8_t *buf, int
> size)
> +{
> + Exynos4210UartState *s = (Exynos4210UartState *)opaque;
> + int i;
> +
> + if (s->reg[I_(UFCON)] & UFCON_FIFO_ENABLE) {
> + if (fifo_empty_elements_number(&s->rx) < size) {
> + for (i = 0; i < fifo_empty_elements_number(&s->rx); i++) {
> + fifo_store(&s->rx, buf[i]);
> + }
> + s->reg[I_(UINTSP)] |= UINTSP_ERROR;
> + s->reg[I_(UTRSTAT)] |= UTRSTAT_Rx_BUFFER_DATA_READY;
> + } else {
> + for (i = 0; i < size; i++) {
> + fifo_store(&s->rx, buf[i]);
> + }
> + s->reg[I_(UTRSTAT)] |= UTRSTAT_Rx_BUFFER_DATA_READY;
> + }
> + /* XXX: after achieve trigger level*/
> + s->reg[I_(UINTSP)] |= UINTSP_RXD;
> + } else {
> + s->reg[I_(URXH)] = buf[0];
> + s->reg[I_(UINTSP)] |= UINTSP_RXD;
> + s->reg[I_(UTRSTAT)] |= UTRSTAT_Rx_BUFFER_DATA_READY;
> + }
> +
> + exynos4210_uart_update_irq(s);
> +}
> +
> +
> +static void exynos4210_uart_event(void *opaque, int event)
> +{
> + /*
> + * TODO: Implement this.
> + *
> + */
> +}
> +
> +
> +static void exynos4210_uart_reset(DeviceState *dev)
> +{
> + Exynos4210UartState *s =
> + container_of(dev, Exynos4210UartState, busdev.qdev);
> + int regs_number = sizeof(exynos4210_uart_regs)/sizeof(Exynos4210UartReg);
> + int i;
> +
> + for (i = 0; i < regs_number; i++) {
> + s->reg[I_(exynos4210_uart_regs[i].offset)] =
> + exynos4210_uart_regs[i].reset_value;
> + }
> +
> + fifo_reset(&s->rx);
> + fifo_reset(&s->tx);
> +
> + PRINT_DEBUG("UART%d: Rx FIFO size: %d\n", s->channel, s->rx.size);
> +}
> +
> +
> +static const VMStateDescription vmstate_exynos4210_uart = {
> + .name = "exynos4210.uart",
> + .version_id = 1,
> + .minimum_version_id = 1,
> + .minimum_version_id_old = 1,
> + .fields = (VMStateField[]) {
> + /*
> + * TODO: We should save fifo too
> + */
Indeed.
> + VMSTATE_UINT32_ARRAY(reg, Exynos4210UartState,
> + EXYNOS4210_UART_REGS_MEM_SIZE),
> + VMSTATE_END_OF_LIST()
> + }
> +};
> +
> +DeviceState *exynos4210_uart_create(target_phys_addr_t addr,
> + int fifo_size,
> + int channel,
> + CharDriverState *chr,
> + qemu_irq irq)
> +{
> + DeviceState *dev;
> + SysBusDevice *bus;
> +
> + dev = qdev_create(NULL, "exynos4210.uart");
> +
> + if (!chr) {
> + if (channel >= MAX_SERIAL_PORTS) {
> + hw_error("Only %d serial ports are supported by QEMU.\n",
> + MAX_SERIAL_PORTS);
> + }
> + chr = serial_hds[channel];
> + if (!chr) {
> + chr = qemu_chr_new("exynos4210.uart", "null", NULL);
> + if (!(chr)) {
> + hw_error("Can't assign serial port to UART%d.\n", channel);
> + }
> + }
> + }
> +
> + qdev_prop_set_chr(dev, "chardev", chr);
> + qdev_prop_set_uint32(dev, "channel", channel);
> + qdev_prop_set_uint32(dev, "rx-size", fifo_size);
> + qdev_prop_set_uint32(dev, "tx-size", fifo_size);
> +
> + bus = sysbus_from_qdev(dev);
> + qdev_init_nofail(dev);
> + if (addr != (target_phys_addr_t)-1) {
> + sysbus_mmio_map(bus, 0, addr);
> + }
> + sysbus_connect_irq(bus, 0, irq);
> +
> + return dev;
> +}
> +
> +static int exynos4210_uart_init(SysBusDevice *dev)
> +{
> + Exynos4210UartState *s = FROM_SYSBUS(Exynos4210UartState, dev);
> +
> + /* memory mapping */
> + memory_region_init_io(&s->iomem, &exynos4210_uart_ops, s,
> "exynos4210.uart",
> + EXYNOS4210_UART_REGS_MEM_SIZE);
> + sysbus_init_mmio(dev, &s->iomem);
> +
> + sysbus_init_irq(dev, &s->irq);
> +
> + qemu_chr_add_handlers(s->chr, exynos4210_uart_can_receive,
> + exynos4210_uart_receive, exynos4210_uart_event, s);
> +
> + return 0;
> +}
> +
> +static SysBusDeviceInfo exynos4210_uart_info = {
> + .init = exynos4210_uart_init,
> + .qdev.name = "exynos4210.uart",
> + .qdev.size = sizeof(Exynos4210UartState),
> + .qdev.vmsd = &vmstate_exynos4210_uart,
> + .qdev.reset = exynos4210_uart_reset,
> + .qdev.props = (Property[]) {
> + DEFINE_PROP_CHR("chardev", Exynos4210UartState, chr),
> + DEFINE_PROP_UINT32("channel", Exynos4210UartState, channel, 0),
> + DEFINE_PROP_UINT32("rx-size", Exynos4210UartState, rx.size, 16),
> + DEFINE_PROP_UINT32("tx-size", Exynos4210UartState, tx.size, 16),
> + DEFINE_PROP_END_OF_LIST(),
> + }
> +};
> +
> +static void exynos4210_uart_register(void)
> +{
> + sysbus_register_withprop(&exynos4210_uart_info);
> +}
> +
> +device_init(exynos4210_uart_register)
> --
> 1.7.4.1
>
>
- [Qemu-devel] [PATCH v3 00/14] ARM: Samsung Exynos4210-based boards support., Evgeny Voevodin, 2011/12/12
- [Qemu-devel] [PATCH v3 04/14] hw/sysbus.h: Increase maximum number of device IRQs., Evgeny Voevodin, 2011/12/12
- [Qemu-devel] [PATCH v3 09/14] hw/exynos4210.c: Boot secondary CPU., Evgeny Voevodin, 2011/12/12
- [Qemu-devel] [PATCH v3 06/14] ARM: exynos4210: PWM support., Evgeny Voevodin, 2011/12/12
- [Qemu-devel] [PATCH v3 10/14] hw/lan9118: Add basic 16-bit mode support., Evgeny Voevodin, 2011/12/12
- [Qemu-devel] [PATCH v3 07/14] hw/arm_boot.c: Add new secondary CPU bootloader., Evgeny Voevodin, 2011/12/12
- [Qemu-devel] [PATCH v3 03/14] ARM: exynos4210: UART support, Evgeny Voevodin, 2011/12/12
- Re: [Qemu-devel] [PATCH v3 03/14] ARM: exynos4210: UART support,
Peter Maydell <=
- [Qemu-devel] [PATCH v3 02/14] ARM: exynos4210: CMU support, Evgeny Voevodin, 2011/12/12
- Re: [Qemu-devel] [PATCH v3 02/14] ARM: exynos4210: CMU support, Dmitry Solodkiy, 2011/12/15
[Qemu-devel] [PATCH v3 11/14] hw/exynos4210.c: Add LAN support for SMDKC210., Evgeny Voevodin, 2011/12/12
[Qemu-devel] [PATCH v3 05/14] ARM: exynos4210: IRQ subsystem support., Evgeny Voevodin, 2011/12/12