472 lines
12 KiB
C
472 lines
12 KiB
C
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#include "asm/iic_hw.h"
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#include "system/generic/gpio.h"
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#include "system/generic/log.h"
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#include "asm/clock.h"
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#include "asm/cpu.h"
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#include "update.h"
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/*
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[[ 注意!!! ]]
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* 适用于带cfg_done的硬件IIC，另一种硬件IIC另作说明
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* 硬件IIC的START / ACK(NACK)必须在发送或接收字节cfg_done前设置，且不能
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接cfg_done单独发送；而STOP则应在发送或接收字节cfg_done后设置，必须接
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cfg_done单独发送
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*/
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struct iic_iomapping {
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u8 scl;
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u8 sda;
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};
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static const struct iic_iomapping hwiic_iomap[IIC_HW_NUM][IIC_PORT_GROUP_NUM] = {
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{
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{IO_PORT_DP, IO_PORT_DM}, //group a
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{IO_PORTC_04, IO_PORTC_05}, //group b
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{IO_PORTB_06, IO_PORTB_07}, //group c
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{IO_PORTA_05, IO_PORTA_06}, //group d
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},
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};
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static JL_IIC_TypeDef *const iic_regs[IIC_HW_NUM] = {
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JL_IIC,
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};
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#define iic_get_id(iic) (iic)
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#define iic_info_port(iic) (hw_iic_cfg[iic_get_id(iic)].port - 'A')
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#define iic_info_baud(iic) (hw_iic_cfg[iic_get_id(iic)].baudrate)
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#define iic_info_hdrive(iic) (hw_iic_cfg[iic_get_id(iic)].hdrive)
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#define iic_info_io_filt(iic) (hw_iic_cfg[iic_get_id(iic)].io_filter)
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#define iic_info_io_pu(iic) (hw_iic_cfg[iic_get_id(iic)].io_pu)
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#define iic_info_role(iic) (hw_iic_cfg[iic_get_id(iic)].role)
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static inline u32 iic_get_scl(hw_iic_dev iic)
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{
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u8 port = iic_info_port(iic);
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return hwiic_iomap[iic_get_id(iic)][port].scl;
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}
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static inline u32 iic_get_sda(hw_iic_dev iic)
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{
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u8 port = iic_info_port(iic);
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return hwiic_iomap[iic_get_id(iic)][port].sda;
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}
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static int iic_port_init(hw_iic_dev iic)
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{
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u32 reg;
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int ret = 0;
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u8 port;
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u8 id = iic_get_id(iic);
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u32 scl, sda;
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port = iic_info_port(iic);
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if (port >= IIC_PORT_GROUP_NUM) {
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return -EINVAL;
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}
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scl = iic_get_scl(iic);
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sda = iic_get_sda(iic);
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if (id == 0) {
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reg = JL_IOMAP->CON1;
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reg &= ~(0x3 << 18);
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reg |= (port << 18);
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JL_IOMAP->CON1 = reg;
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#if 0
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if (port == 0) {
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//USB_DP, USB_DM init
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log_w("warning!!! iic overwrite usb configuration\n");
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JL_USB_IO->CON0 |= (BIT(11) | BIT(8)); //IO MODE
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/* JL_USB_IO->CON0 &= ~BIT(2); //DP DIR OUT */
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/* JL_USB_IO->CON0 &= ~BIT(3); //DM DIR OUT */
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/* JL_USB_IO->CON0 |= BIT(0); //DP output 1 */
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/* JL_USB_IO->CON0 |= BIT(1); //DM output 1 */
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if (iic_info_io_pu(iic)) {
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JL_USB_IO->CON0 |= BIT(6); //DP PU
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JL_USB_IO->CON0 |= BIT(7); //DM PU
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} else {
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JL_USB_IO->CON0 &= ~BIT(6); //DP PU
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JL_USB_IO->CON0 &= ~BIT(7); //DM PU
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}
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} else {
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//gpio_direction_output(sca, 1);
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//gpio_direction_output(sda, 1);
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if (iic_info_hdrive(iic)) {
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gpio_set_hd(scl, 1);
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gpio_set_hd(sda, 1);
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} else {
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gpio_set_hd(scl, 0);
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gpio_set_hd(sda, 0);
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}
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if (iic_info_io_pu(iic)) {
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gpio_set_pull_up(scl, 1);
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gpio_set_pull_up(sda, 1);
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} else {
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gpio_set_pull_up(scl, 0);
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gpio_set_pull_up(sda, 0);
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}
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}
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#else
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if (port == 0) {
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usb_iomode(1);
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}
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if (iic_info_hdrive(iic)) {
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gpio_set_hd(scl, 1);
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gpio_set_hd(sda, 1);
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} else {
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gpio_set_hd(scl, 0);
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gpio_set_hd(sda, 0);
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}
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if (iic_info_io_pu(iic)) {
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gpio_set_pull_up(scl, 1);
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gpio_set_pull_up(sda, 1);
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} else {
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gpio_set_pull_up(scl, 0);
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gpio_set_pull_up(sda, 0);
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}
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#endif
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//} else if (fh->id == 1) {
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} else {
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ret = -EINVAL;
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}
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return ret;
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}
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int hw_iic_set_baud(hw_iic_dev iic, u32 baud)
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{
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//f_iic = f_sys / ((IIC_BAUD + 1) * 2)
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//=> IIC_BAUD = f_sys / (2 * f_iic) - 1
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u32 sysclk;
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u8 id = iic_get_id(iic);
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sysclk = clk_get("lsb");
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if (sysclk < 2 * baud) {
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return -EINVAL;
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}
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iic_baud_reg(iic_regs[id]) = sysclk / (2 * baud) - 1;
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return 0;
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}
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static void hw_iic_set_die(hw_iic_dev iic, u8 en)
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{
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u8 id = iic_get_id(iic);
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u8 port = iic_info_port(iic);
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u32 scl, sda;
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if (port >= IIC_PORT_GROUP_NUM) {
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return ;
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}
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scl = iic_get_scl(iic);
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sda = iic_get_sda(iic);
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if (id == 0) {
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#if 0
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if (port == 0) {
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if (en) {
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JL_USB_IO->CON0 |= BIT(9); //DP 1.2V digital input en
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JL_USB_IO->CON0 |= BIT(10); //DM 1.2V digital input en
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} else {
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JL_USB_IO->CON0 &= ~BIT(9);
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JL_USB_IO->CON0 &= ~BIT(10);
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}
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} else {
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gpio_set_die(scl, en); //!!!must set
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gpio_set_die(sda, en); //!!!must set
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}
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#else
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gpio_set_die(scl, en);
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gpio_set_die(sda, en);
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#endif
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} else {
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//undefined
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}
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}
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void hw_iic_suspend(hw_iic_dev iic)
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{
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hw_iic_set_die(iic, 0);
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}
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void hw_iic_resume(hw_iic_dev iic)
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{
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hw_iic_set_die(iic, 1);
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}
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int hw_iic_init(hw_iic_dev iic)
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{
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int ret;
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u8 id = iic_get_id(iic);
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if ((ret = iic_port_init(iic))) {
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log_e("invalid hardware iic port\n");
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return ret;
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}
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hw_iic_set_die(iic, 1);
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if (iic_info_role(iic) == IIC_MASTER) {
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iic_role_host(iic_regs[id]);
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} else {
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iic_role_slave(iic_regs[id]);
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iic_si_mode_en(iic_regs[id]);
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}
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if (iic_info_io_filt(iic)) {
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iic_isel_filter(iic_regs[id]);
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} else {
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iic_isel_direct(iic_regs[id]);
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}
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if ((ret = hw_iic_set_baud(iic, iic_info_baud(iic)))) {
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log_e("iic baudrate is invalid\n");
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return ret ;
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}
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iic_pnd_clr(iic_regs[id]);
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iic_end_pnd_clr(iic_regs[id]);
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iic_start_pnd_clr(iic_regs[id]);
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iic_enable(iic_regs[id]);
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#if 0
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printf("info->scl = %d\n", iic_get_scl(iic));
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printf("info->sda = %d\n", iic_get_sda(iic));
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printf("info->baudrate = %d\n", iic_info_baud(iic));
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printf("info->hdrive = %d\n", iic_info_hdrive(iic));
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printf("info->io_filter = %d\n", iic_info_io_filt(iic));
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printf("info->io_pu = %d\n", iic_info_io_pu(iic));
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printf("info->role = %d\n", iic_info_role(iic));
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printf("IIC_CON0 0x%04x\n", iic_regs[id]->CON0);
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printf("IIC_CON1 0x%04x\n", iic_regs[id]->CON1);
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printf("IIC_BAUD 0x%02x\n", iic_regs[id]->BAUD);
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//printf("IIC_BUF %02x\n", iic_regs[id]->BUF);
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printf("IOMC1 0x%08x\n", JL_IOMAP->CON1);
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#endif
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return 0;
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}
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void hw_iic_uninit(hw_iic_dev iic)
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{
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u8 id = iic_get_id(iic);
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u8 port = iic_info_port(iic);
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u32 scl, sda;
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scl = iic_get_scl(iic);
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sda = iic_get_sda(iic);
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hw_iic_set_die(iic, 0);
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if (id == 0) {
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#if 0
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if (port == 0) {
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//JL_USB_IO->CON0 |= BIT(2); //DP DIR IN
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//JL_USB_IO->CON0 |= BIT(3); //DM DIR IN
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JL_USB_IO->CON0 &= ~(BIT(11) | BIT(8)); //disable IO_MODE
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JL_USB_IO->CON0 &= ~BIT(6); //DP PU
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JL_USB_IO->CON0 &= ~BIT(7); //DM PU
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} else {
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/* gpio_set_direction(scl, 1); */
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/* gpio_set_direction(sda, 1); */
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gpio_set_hd(scl, 0);
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gpio_set_hd(sda, 0);
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gpio_set_pull_up(scl, 0);
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gpio_set_pull_up(sda, 0);
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}
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#else
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gpio_set_hd(scl, 0);
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gpio_set_hd(sda, 0);
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gpio_set_pull_up(scl, 0);
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gpio_set_pull_up(sda, 0);
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if (port == 0) {
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usb_iomode(0);
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}
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#endif
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}
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iic_disable(iic_regs[id]);
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}
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void hw_iic_start(hw_iic_dev iic)
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{
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u8 id = iic_get_id(iic);
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iic_preset_restart(iic_regs[id]);
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//don't add iic_cfg_done() here, it must be used with send byte
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}
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void hw_iic_stop(hw_iic_dev iic)
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{
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u8 id = iic_get_id(iic);
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iic_preset_end(iic_regs[id]);
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iic_cfg_done(iic_regs[id]);
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}
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u8 hw_iic_tx_byte(hw_iic_dev iic, u8 byte)
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{
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u8 id = iic_get_id(iic);
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iic_dir_out(iic_regs[id]);
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iic_buf_reg(iic_regs[id]) = byte;
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iic_cfg_done(iic_regs[id]);
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/* putchar('a'); */
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while (!iic_pnd(iic_regs[id]));
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iic_pnd_clr(iic_regs[id]);
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/* putchar('b'); */
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return iic_send_is_ack(iic_regs[id]);
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}
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u8 hw_iic_rx_byte(hw_iic_dev iic, u8 ack)
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{
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u8 id = iic_get_id(iic);
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iic_dir_in(iic_regs[id]);
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if (ack) {
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iic_recv_ack(iic_regs[id]);
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} else {
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iic_recv_nack(iic_regs[id]);
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}
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iic_buf_reg(iic_regs[id]) = 0xff;
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iic_cfg_done(iic_regs[id]);
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/* putchar('c'); */
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while (!iic_pnd(iic_regs[id]));
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iic_pnd_clr(iic_regs[id]);
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/* putchar('d'); */
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return iic_buf_reg(iic_regs[id]);
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}
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int hw_iic_read_buf(hw_iic_dev iic, void *buf, int len)
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{
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u8 id = iic_get_id(iic);
|
|||
|
|
int i;
|
|||
|
|
|
|||
|
|
if (!buf || !len) {
|
|||
|
|
return -1;
|
|||
|
|
}
|
|||
|
|
iic_dir_in(iic_regs[id]);
|
|||
|
|
iic_recv_ack(iic_regs[id]);
|
|||
|
|
for (i = 0; i < len; i++) {
|
|||
|
|
if (i == len - 1) {
|
|||
|
|
iic_recv_nack(iic_regs[id]);
|
|||
|
|
}
|
|||
|
|
iic_buf_reg(iic_regs[id]) = 0xff;
|
|||
|
|
iic_cfg_done(iic_regs[id]);
|
|||
|
|
while (!iic_pnd(iic_regs[id]));
|
|||
|
|
iic_pnd_clr(iic_regs[id]);
|
|||
|
|
((u8 *)buf)[i] = iic_buf_reg(iic_regs[id]);
|
|||
|
|
}
|
|||
|
|
return len;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
int hw_iic_write_buf(hw_iic_dev iic, const void *buf, int len)
|
|||
|
|
{
|
|||
|
|
u8 id = iic_get_id(iic);
|
|||
|
|
int i = 0;
|
|||
|
|
|
|||
|
|
if (!buf || !len) {
|
|||
|
|
return -1;
|
|||
|
|
}
|
|||
|
|
iic_dir_out(iic_regs[id]);
|
|||
|
|
for (i = 0; i < len; i++) {
|
|||
|
|
iic_buf_reg(iic_regs[id]) = ((u8 *)buf)[i];
|
|||
|
|
iic_cfg_done(iic_regs[id]);
|
|||
|
|
while (!iic_pnd(iic_regs[id]));
|
|||
|
|
iic_pnd_clr(iic_regs[id]);
|
|||
|
|
if (!iic_send_is_ack(iic_regs[id])) {
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return i;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void hw_iic_set_ie(hw_iic_dev iic, u8 en)
|
|||
|
|
{
|
|||
|
|
u8 id = iic_get_id(iic);
|
|||
|
|
|
|||
|
|
if (en) {
|
|||
|
|
iic_set_ie(iic_regs[id]);
|
|||
|
|
} else {
|
|||
|
|
iic_clr_ie(iic_regs[id]);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
u8 hw_iic_get_pnd(hw_iic_dev iic)
|
|||
|
|
{
|
|||
|
|
u8 id = iic_get_id(iic);
|
|||
|
|
|
|||
|
|
return !!iic_pnd(iic_regs[id]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void hw_iic_clr_pnd(hw_iic_dev iic)
|
|||
|
|
{
|
|||
|
|
u8 id = iic_get_id(iic);
|
|||
|
|
|
|||
|
|
iic_pnd_clr(iic_regs[id]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void hw_iic_set_end_ie(hw_iic_dev iic, u8 en)
|
|||
|
|
{
|
|||
|
|
u8 id = iic_get_id(iic);
|
|||
|
|
|
|||
|
|
if (en) {
|
|||
|
|
iic_set_end_ie(iic_regs[id]);
|
|||
|
|
} else {
|
|||
|
|
iic_clr_end_ie(iic_regs[id]);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
u8 hw_iic_get_end_pnd(hw_iic_dev iic)
|
|||
|
|
{
|
|||
|
|
u8 id = iic_get_id(iic);
|
|||
|
|
|
|||
|
|
return !!iic_end_pnd(iic_regs[id]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void hw_iic_clr_end_pnd(hw_iic_dev iic)
|
|||
|
|
{
|
|||
|
|
u8 id = iic_get_id(iic);
|
|||
|
|
|
|||
|
|
iic_end_pnd_clr(iic_regs[id]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void hw_iic_slave_set_addr(hw_iic_dev iic, u8 addr, u8 addr_ack)
|
|||
|
|
{
|
|||
|
|
u8 id = iic_get_id(iic);
|
|||
|
|
|
|||
|
|
iic_baud_reg(iic_regs[id]) = (addr & 0xfe) | !!addr_ack;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void hw_iic_slave_rx_prepare(hw_iic_dev iic, u8 ack)
|
|||
|
|
{
|
|||
|
|
u8 id = iic_get_id(iic);
|
|||
|
|
|
|||
|
|
iic_dir_in(iic_regs[id]);
|
|||
|
|
if (ack) {
|
|||
|
|
iic_recv_ack(iic_regs[id]);
|
|||
|
|
} else {
|
|||
|
|
iic_recv_nack(iic_regs[id]);
|
|||
|
|
}
|
|||
|
|
iic_buf_reg(iic_regs[id]) = 0xff;
|
|||
|
|
iic_cfg_done(iic_regs[id]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
u8 hw_iic_slave_rx_byte(hw_iic_dev iic, bool *is_start_addr)
|
|||
|
|
{
|
|||
|
|
u8 id = iic_get_id(iic);
|
|||
|
|
if (iic_start_pnd(iic_regs[id])) {
|
|||
|
|
iic_start_pnd_clr(iic_regs[id]);
|
|||
|
|
is_start_addr ? (*is_start_addr = 1) : 0;
|
|||
|
|
} else {
|
|||
|
|
is_start_addr ? (*is_start_addr = 0) : 0;
|
|||
|
|
}
|
|||
|
|
return iic_buf_reg(iic_regs[id]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void hw_iic_slave_tx_byte(hw_iic_dev iic, u8 byte)
|
|||
|
|
{
|
|||
|
|
u8 id = iic_get_id(iic);
|
|||
|
|
|
|||
|
|
iic_dir_out(iic_regs[id]);
|
|||
|
|
iic_buf_reg(iic_regs[id]) = byte;
|
|||
|
|
iic_cfg_done(iic_regs[id]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
u8 hw_iic_slave_tx_check_ack(hw_iic_dev iic)
|
|||
|
|
{
|
|||
|
|
u8 id = iic_get_id(iic);
|
|||
|
|
|
|||
|
|
return iic_send_is_ack(iic_regs[id]);
|
|||
|
|
}
|
|||
|
|
void iic_disable_for_ota()
|
|||
|
|
{
|
|||
|
|
JL_IIC->CON0 = 0;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
REGISTER_UPDATE_TARGET(iic_update_target) = {
|
|||
|
|
.name = "iic",
|
|||
|
|
.driver_close = iic_disable_for_ota,
|
|||
|
|
};
|