void lpc_set_host_event_state(uint32_t mask)
{
if (mask != host_events) {
host_events = mask;
update_host_event_status();
}
}
static void lpc_init(void)
{
/* Enable clock for LPC peripheral */
clock_enable_peripheral(CGC_OFFSET_LPC, CGC_LPC_MASK,
CGC_MODE_RUN | CGC_MODE_SLEEP);
/* Switching to LPC interface */
NPCX_DEVCNT |= 0x04;
/* Enable 4E/4F */
if (!IS_BIT_SET(NPCX_MSWCTL1, 3)) {
NPCX_HCBAL = 0x4E;
NPCX_HCBAH = 0x0;
}
/* Clear Host Access Hold state */
NPCX_SMC_CTL = 0xC0;
/*
* Set alternative pin from GPIO to CLKRUN no matter SERIRQ is under
* continuous or quiet mode.
*/
SET_BIT(NPCX_DEVALT(1), NPCX_DEVALT1_CLKRN_SL);
/* Initialize Hardware for UART Host */
#if CONFIG_UART_HOST
/* Init COMx LPC UART */
/* FMCLK have to using 50MHz */
NPCX_DEVALT(0xB) = 0xFF;
/* Make sure Host Access unlock */
CLEAR_BIT(NPCX_LKSIOHA, 2);
/* Clear Host Access Lock Violation */
SET_BIT(NPCX_SIOLV, 2);
#endif
/* Don't stall SHM transactions */
NPCX_SHM_CTL = NPCX_SHM_CTL & ~0x40;
/* Semaphore and Indirect access disable */
NPCX_SHCFG = 0xE0;
/* Disable Protect Win1&2*/
NPCX_WIN_WR_PROT(0) = 0;
NPCX_WIN_WR_PROT(1) = 0;
NPCX_WIN_RD_PROT(0) = 0;
NPCX_WIN_RD_PROT(1) = 0;
/* Open Win1 256 byte for Host CMD, Win2 256 for MEMMAP*/
NPCX_WIN_SIZE = 0x88;
NPCX_WIN_BASE(0) = (uint32_t)shm_mem_host_cmd;
NPCX_WIN_BASE(1) = (uint32_t)shm_memmap;
/* Write protect of Share memory */
NPCX_WIN_WR_PROT(1) = 0xFF;
/* Turn on PMC2 for Host Command usage */
SET_BIT(NPCX_HIPMCTL(PMC_HOST_CMD), 0);
SET_BIT(NPCX_HIPMCTL(PMC_HOST_CMD), 1);
/*
* Set required control value (avoid setting HOSTWAIT bit at this stage)
*/
NPCX_SMC_CTL = NPCX_SMC_CTL&~0x7F;
/* Clear status */
NPCX_SMC_STS = NPCX_SMC_STS;
/* Create mailbox */
/*
* Init KBC
* Clear OBF status flag, PM1 IBF/OBE INT enable, IRQ11 enable,
* IBF(K&M) INT enable, OBE(K&M) empty INT enable ,
* OBF Mouse Full INT enable and OBF KB Full INT enable
*/
NPCX_HICTRL = 0xFF;
/* Normally Polarity IRQ1,12,11 type (level + high) setting */
NPCX_HIIRQC = 0x00; /* Make sure to default */
/*
* Init PORT80
* Enable Port80, Enable Port80 function & Interrupt & Read auto
*/
NPCX_DP80CTL = 0x29;
SET_BIT(NPCX_GLUE_SDP_CTS, 3);
#if SUPPORT_P80_SEG
SET_BIT(NPCX_GLUE_SDP_CTS, 0);
#endif
lpc_task_enable_irq();
/* Initialize host args and memory map to all zero */
memset(lpc_host_args, 0, sizeof(*lpc_host_args));
memset(lpc_get_memmap_range(), 0, EC_MEMMAP_SIZE);
/* We support LPC args and version 3 protocol */
*(lpc_get_memmap_range() + EC_MEMMAP_HOST_CMD_FLAGS) =
EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED |
EC_HOST_CMD_FLAG_VERSION_3;
/* Restore event masks if needed */
lpc_post_sysjump();
/* Sufficiently initialized */
init_done = 1;
/* Update host events now that we can copy them to memmap */
update_host_event_status();
/*
* TODO: For testing LPC with Chromebox, please make sure LPC_CLK is
* generated before executing this function. EC needs LPC_CLK to access
* LPC register through SIB module. For Chromebook platform, this
* functionality should be done by BIOS or executed in hook function of
* HOOK_CHIPSET_STARTUP
*/
#ifdef BOARD_NPCX_EVB
/* initial IO port address via SIB-write modules */
lpc_host_register_init();
#else
/* Initialize LRESET# interrupt */
/* Set detection mode to edge */
CLEAR_BIT(NPCX_WKMOD(MIWU_TABLE_0, MIWU_GROUP_5), 7);
/* Handle interrupting on rising edge */
CLEAR_BIT(NPCX_WKAEDG(MIWU_TABLE_0, MIWU_GROUP_5), 7);
SET_BIT(NPCX_WKEDG(MIWU_TABLE_0, MIWU_GROUP_5), 7);
/* Enable wake-up input sources */
SET_BIT(NPCX_WKEN(MIWU_TABLE_0, MIWU_GROUP_5), 7);
#endif
}
void lpc_set_host_event_mask(enum lpc_host_event_type type, uint32_t mask)
{
event_mask[type] = mask;
update_host_event_status();
}
static void lpc_init(void)
{
/*
* DLM 52k~56k size select enable.
* For mapping LPC I/O cycle 800h ~ 9FFh to DLM 8D800 ~ 8D9FF.
*/
IT83XX_GCTRL_MCCR2 |= 0x10;
IT83XX_GPIO_GCR = 0x06;
/* The register pair to access PNPCFG is 004Eh and 004Fh */
IT83XX_GCTRL_BADRSEL = 0x01;
/* Disable KBC IRQ */
IT83XX_KBC_KBIRQR = 0x00;
/*
* bit2, Output Buffer Empty CPU Interrupt Enable.
* bit3, Input Buffer Full CPU Interrupt Enable.
*/
IT83XX_KBC_KBHICR |= 0x0C;
/* PM1 Input Buffer Full Interrupt Enable for 62h/66 port */
pm_set_ctrl(LPC_ACPI_CMD, PM_CTRL_IBFIE, 1);
/* PM2 Input Buffer Full Interrupt Enable for 200h/204 port */
pm_set_ctrl(LPC_HOST_CMD, PM_CTRL_IBFIE, 1);
memset(lpc_get_memmap_range(), 0, EC_MEMMAP_SIZE);
memset(lpc_host_args, 0, sizeof(*lpc_host_args));
/* Host LPC I/O cycle mapping to RAM */
/*
* bit[4], H2RAM through LPC IO cycle.
* bit[1], H2RAM window 1 enabled.
* bit[0], H2RAM window 0 enabled.
*/
IT83XX_SMFI_HRAMWC |= 0x13;
/*
* bit[7:6]
* Host RAM Window[x] Read Protect Enable
* 00b: Disabled
* 01b: Lower half of RAM window protected
* 10b: Upper half of RAM window protected
* 11b: All protected
*
* bit[5:4]
* Host RAM Window[x] Write Protect Enable
* 00b: Disabled
* 01b: Lower half of RAM window protected
* 10b: Upper half of RAM window protected
* 11b: All protected
*
* bit[2:0]
* Host RAM Window 1 Size (HRAMW1S)
* 0h: 16 bytes
* 1h: 32 bytes
* 2h: 64 bytes
* 3h: 128 bytes
* 4h: 256 bytes
* 5h: 512 bytes
* 6h: 1024 bytes
* 7h: 2048 bytes
*/
/* H2RAM Win 0 Base Address 800h allow r/w for host_cmd_memmap */
IT83XX_SMFI_HRAMW0BA = 0x80;
IT83XX_SMFI_HRAMW0AAS = 0x04;
/* H2RAM Win 1 Base Address 900h allow r for acpi_ec_memmap */
IT83XX_SMFI_HRAMW1BA = 0x90;
IT83XX_SMFI_HRAMW1AAS = 0x34;
/* We support LPC args and version 3 protocol */
*(lpc_get_memmap_range() + EC_MEMMAP_HOST_CMD_FLAGS) =
EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED |
EC_HOST_CMD_FLAG_VERSION_3;
/*
* bit[5], Dedicated interrupt
* INT3: PMC1 Output Buffer Empty Int
* INT25: PMC1 Input Buffer Full Int
* INT26: PMC2 Output Buffer Empty Int
* INT27: PMC2 Input Buffer Full Int
*/
IT83XX_PMC_MBXCTRL |= 0x20;
/* PM3 Input Buffer Full Interrupt Enable for 80h port */
pm_set_ctrl(LPC_HOST_PORT_80H, PM_CTRL_IBFIE, 1);
gpio_enable_interrupt(GPIO_PCH_PLTRST_L);
task_clear_pending_irq(IT83XX_IRQ_KBC_OUT);
task_disable_irq(IT83XX_IRQ_KBC_OUT);
task_clear_pending_irq(IT83XX_IRQ_KBC_IN);
task_enable_irq(IT83XX_IRQ_KBC_IN);
task_clear_pending_irq(IT83XX_IRQ_PMC_IN);
task_enable_irq(IT83XX_IRQ_PMC_IN);
task_clear_pending_irq(IT83XX_IRQ_PMC2_IN);
task_enable_irq(IT83XX_IRQ_PMC2_IN);
task_clear_pending_irq(IT83XX_IRQ_PMC3_IN);
task_enable_irq(IT83XX_IRQ_PMC3_IN);
/* Sufficiently initialized */
init_done = 1;
/* Update host events now that we can copy them to memmap */
update_host_event_status();
}
/*
* Most registers in LPC module are reset when the host is off. We need to
* set up LPC again when the host is starting up.
*/
static void setup_lpc(void)
{
gpio_config_module(MODULE_LPC, 1);
/* Set up interrupt on LRESET# deassert */
MEC1322_INT_SOURCE(19) = 1 << 1;
MEC1322_INT_ENABLE(19) |= 1 << 1;
MEC1322_INT_BLK_EN |= 1 << 19;
task_enable_irq(MEC1322_IRQ_GIRQ19);
/* Set up ACPI0 for 0x62/0x66 */
MEC1322_LPC_ACPI_EC0_BAR = 0x00628304;
MEC1322_INT_ENABLE(15) |= 1 << 6;
MEC1322_INT_BLK_EN |= 1 << 15;
/* Clear STATUS_PROCESSING bit in case it was set during sysjump */
MEC1322_ACPI_EC_STATUS(0) &= ~EC_LPC_STATUS_PROCESSING;
task_enable_irq(MEC1322_IRQ_ACPIEC0_IBF);
/* Set up ACPI1 for 0x200/0x204 */
MEC1322_LPC_ACPI_EC1_BAR = 0x02008407;
MEC1322_INT_ENABLE(15) |= 1 << 8;
MEC1322_INT_BLK_EN |= 1 << 15;
MEC1322_ACPI_EC_STATUS(1) &= ~EC_LPC_STATUS_PROCESSING;
task_enable_irq(MEC1322_IRQ_ACPIEC1_IBF);
/* Set up 8042 interface at 0x60/0x64 */
MEC1322_LPC_8042_BAR = 0x00608104;
/* Set up indication of Auxillary sts */
MEC1322_8042_KB_CTRL |= 1 << 7;
MEC1322_8042_ACT |= 1;
MEC1322_INT_ENABLE(15) |= ((1 << 13) | (1 << 14));
MEC1322_INT_BLK_EN |= 1 << 15;
task_enable_irq(MEC1322_IRQ_8042EM_IBF);
task_enable_irq(MEC1322_IRQ_8042EM_OBF);
#ifndef CONFIG_KEYBOARD_IRQ_GPIO
/* Set up SERIRQ for keyboard */
MEC1322_8042_KB_CTRL |= (1 << 5);
MEC1322_LPC_SIRQ(1) = 0x01;
#endif
/* Set up EMI module for memory mapped region, base address 0x800 */
MEC1322_LPC_EMI_BAR = 0x0800800f;
MEC1322_INT_ENABLE(15) |= 1 << 2;
MEC1322_INT_BLK_EN |= 1 << 15;
task_enable_irq(MEC1322_IRQ_EMI);
/* Access data RAM through alias address */
MEC1322_EMI_MBA0 = (uint32_t)mem_mapped - 0x118000 + 0x20000000;
/*
* Limit EMI read / write range. First 256 bytes are RW for host
* commands. Second 256 bytes are RO for mem-mapped data.
*/
MEC1322_EMI_MRL0 = 0x200;
MEC1322_EMI_MWL0 = 0x100;
/* Set up Mailbox for Port80 trapping */
MEC1322_MBX_INDEX = 0xff;
MEC1322_LPC_MAILBOX_BAR = 0x00808901;
/* We support LPC args and version 3 protocol */
*(lpc_get_memmap_range() + EC_MEMMAP_HOST_CMD_FLAGS) =
EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED |
EC_HOST_CMD_FLAG_VERSION_3;
/* Sufficiently initialized */
init_done = 1;
/* Update host events now that we can copy them to memmap */
update_host_event_status();
}
static void lpc_init(void)
{
/* Enable clock for LPC peripheral */
clock_enable_peripheral(CGC_OFFSET_LPC, CGC_LPC_MASK,
CGC_MODE_RUN | CGC_MODE_SLEEP);
#ifdef CONFIG_ESPI
/* Enable clock for eSPI peripheral */
clock_enable_peripheral(CGC_OFFSET_ESPI, CGC_ESPI_MASK,
CGC_MODE_RUN | CGC_MODE_SLEEP);
/* Initialize eSPI IP */
espi_init();
#else
/* Switching to LPC interface */
NPCX_DEVCNT |= 0x04;
#endif
/* Enable 4E/4F */
if (!IS_BIT_SET(NPCX_MSWCTL1, NPCX_MSWCTL1_VHCFGA)) {
NPCX_HCBAL = 0x4E;
NPCX_HCBAH = 0x0;
}
/* Clear Host Access Hold state */
NPCX_SMC_CTL = 0xC0;
#ifndef CONFIG_ESPI
/*
* Set alternative pin from GPIO to CLKRUN no matter SERIRQ is under
* continuous or quiet mode.
*/
SET_BIT(NPCX_DEVALT(1), NPCX_DEVALT1_CLKRN_SL);
#endif
/*
* Set pin-mux from GPIOs to SCL/SMI to make sure toggling SCIB/SMIB is
* valid if CONFIG_SCI_GPIO isn't defined. eSPI sends SMI/SCI through VW
* automatically by toggling them, too. It's unnecessary to set pin mux.
*/
#if !defined(CONFIG_SCI_GPIO) && !defined(CONFIG_ESPI)
SET_BIT(NPCX_DEVALT(1), NPCX_DEVALT1_EC_SCI_SL);
SET_BIT(NPCX_DEVALT(1), NPCX_DEVALT1_SMI_SL);
#endif
/* Initialize Hardware for UART Host */
#if CONFIG_UART_HOST
/* Init COMx LPC UART */
/* FMCLK have to using 50MHz */
NPCX_DEVALT(0xB) = 0xFF;
/* Make sure Host Access unlock */
CLEAR_BIT(NPCX_LKSIOHA, 2);
/* Clear Host Access Lock Violation */
SET_BIT(NPCX_SIOLV, 2);
#endif
/* Don't stall SHM transactions */
NPCX_SHM_CTL = NPCX_SHM_CTL & ~0x40;
/* Semaphore and Indirect access disable */
NPCX_SHCFG = 0xE0;
/* Disable Protect Win1&2*/
NPCX_WIN_WR_PROT(0) = 0;
NPCX_WIN_WR_PROT(1) = 0;
NPCX_WIN_RD_PROT(0) = 0;
NPCX_WIN_RD_PROT(1) = 0;
/* Open Win1 256 byte for Host CMD, Win2 256 for MEMMAP*/
NPCX_WIN_SIZE = 0x88;
NPCX_WIN_BASE(0) = (uint32_t)shm_mem_host_cmd;
NPCX_WIN_BASE(1) = (uint32_t)shm_memmap;
/* Write protect of Share memory */
NPCX_WIN_WR_PROT(1) = 0xFF;
/* We support LPC args and version 3 protocol */
*(lpc_get_memmap_range() + EC_MEMMAP_HOST_CMD_FLAGS) =
EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED |
EC_HOST_CMD_FLAG_VERSION_3;
/* Turn on PMC2 for Host Command usage */
SET_BIT(NPCX_HIPMCTL(PMC_HOST_CMD), 0);
SET_BIT(NPCX_HIPMCTL(PMC_HOST_CMD), 1);
/*
* Set required control value (avoid setting HOSTWAIT bit at this stage)
*/
NPCX_SMC_CTL = NPCX_SMC_CTL&~0x7F;
/* Clear status */
NPCX_SMC_STS = NPCX_SMC_STS;
/* Restore event masks if needed */
lpc_post_sysjump();
/* Create mailbox */
/*
* Init KBC
* Clear OBF status flag,
* IBF(K&M) INT enable, OBE(K&M) empty INT enable ,
* OBF Mouse Full INT enable and OBF KB Full INT enable
*/
NPCX_HICTRL = 0x8F;
/*
* Turn on enhance mode on PM channel-1,
* enable OBE/IBF core interrupt
*/
NPCX_HIPMCTL(PMC_ACPI) |= 0x83;
/* Normally Polarity IRQ1,12 type (level + high) setting */
NPCX_HIIRQC = 0x00;
/*
* Init PORT80
* Enable Port80, Enable Port80 function & Interrupt & Read auto
*/
#ifdef CONFIG_ESPI
NPCX_DP80CTL = 0x2b;
#else
NPCX_DP80CTL = 0x29;
#endif
SET_BIT(NPCX_GLUE_SDP_CTS, 3);
#if SUPPORT_P80_SEG
SET_BIT(NPCX_GLUE_SDP_CTS, 0);
#endif
/*
* Use SMI/SCI postive polarity as default.
* Negative polarity must be enabled in the case that SMI/SCI is
* generated automatically by hardware. In current design,
* SMI/SCI is conntrolled by FW. Use postive polarity is more
* intuitive.
*/
CLEAR_BIT(NPCX_HIPMCTL(PMC_ACPI), NPCX_HIPMCTL_SCIPOL);
CLEAR_BIT(NPCX_HIPMIC(PMC_ACPI), NPCX_HIPMIC_SMIPOL);
/* Set SMIB/SCIB to make sure SMI/SCI are high at init */
NPCX_HIPMIC(PMC_ACPI) = NPCX_HIPMIC(PMC_ACPI)
| (1 << NPCX_HIPMIC_SMIB) | (1 << NPCX_HIPMIC_SCIB);
#ifndef CONFIG_SCI_GPIO
/*
* Allow SMI/SCI generated from PM module.
* Either hardware autimatically generates,
* or set SCIB/SMIB bit in HIPMIC register.
*/
SET_BIT(NPCX_HIPMIE(PMC_ACPI), NPCX_HIPMIE_SCIE);
SET_BIT(NPCX_HIPMIE(PMC_ACPI), NPCX_HIPMIE_SMIE);
#endif
lpc_task_enable_irq();
/* Sufficiently initialized */
init_done = 1;
/* Update host events now that we can copy them to memmap */
update_host_event_status();
/*
* TODO: For testing LPC with Chromebox, please make sure LPC_CLK is
* generated before executing this function. EC needs LPC_CLK to access
* LPC register through SIB module. For Chromebook platform, this
* functionality should be done by BIOS or executed in hook function of
* HOOK_CHIPSET_STARTUP
*/
#ifdef BOARD_NPCX_EVB
/* initial IO port address via SIB-write modules */
host_register_init();
#else
/* Initialize LRESET# interrupt */
/* Set detection mode to edge */
CLEAR_BIT(NPCX_WKMOD(MIWU_TABLE_0, MIWU_GROUP_5), 7);
/* Handle interrupting on any edge */
SET_BIT(NPCX_WKAEDG(MIWU_TABLE_0, MIWU_GROUP_5), 7);
/* Enable wake-up input sources */
SET_BIT(NPCX_WKEN(MIWU_TABLE_0, MIWU_GROUP_5), 7);
#endif
}
static void lpc_init(void)
{
/* Enable clock for LPC peripheral */
clock_enable_peripheral(CGC_OFFSET_LPC, CGC_LPC_MASK,
CGC_MODE_RUN | CGC_MODE_SLEEP);
/* Switching to LPC interface */
NPCX_DEVCNT |= 0x04;
/* Enable 4E/4F */
if (!IS_BIT_SET(NPCX_MSWCTL1, 3)) {
NPCX_HCBAL = 0x4E;
NPCX_HCBAH = 0x0;
}
/* Clear Host Access Hold state */
NPCX_SMC_CTL = 0xC0;
/* Initialize Hardware for UART Host */
#if CONFIG_UART_HOST
/* Init COMx LPC UART */
/* FMCLK have to using 50MHz */
NPCX_DEVALT(0xB) = 0xFF;
/* Make sure Host Access unlock */
CLEAR_BIT(NPCX_LKSIOHA, 2);
/* Clear Host Access Lock Violation */
SET_BIT(NPCX_SIOLV, 2);
#endif
/* Don't stall SHM transactions */
NPCX_SHM_CTL = NPCX_SHM_CTL & ~0x40;
/* Semaphore and Indirect access disable */
NPCX_SHCFG = 0xE0;
/* Disable Protect Win1&2*/
NPCX_WIN_WR_PROT(0) = 0;
NPCX_WIN_WR_PROT(1) = 0;
NPCX_WIN_RD_PROT(0) = 0;
NPCX_WIN_RD_PROT(1) = 0;
/* Open Win1 256 byte for Host CMD, Win2 256 for MEMMAP*/
NPCX_WIN_SIZE = 0x88;
NPCX_WIN_BASE(0) = (uint32_t)shm_mem_host_cmd;
NPCX_WIN_BASE(1) = (uint32_t)shm_memmap;
/* Turn on PMC2 for Host Command usage */
SET_BIT(NPCX_HIPMCTL(PM_CHAN_2), 0);
SET_BIT(NPCX_HIPMCTL(PM_CHAN_2), 1);
/* enable PMC2 IRQ */
SET_BIT(NPCX_HIPMIE(PM_CHAN_2), 0);
/* IRQ control from HW */
SET_BIT(NPCX_HIPMIE(PM_CHAN_2), 3);
/*
* Set required control value (avoid setting HOSTWAIT bit at this stage)
*/
NPCX_SMC_CTL = NPCX_SMC_CTL&~0x7F;
/* Clear status */
NPCX_SMC_STS = NPCX_SMC_STS;
/* Create mailbox */
/*
* Init KBC
* Clear OBF status, PM1 IBF/OBF INT enable, IRQ11 enable,
* IBF(K&M) INT enable, OBF(K&M) empty INT enable ,
* OBF Mouse Full INT enable and OBF KB Full INT enable
*/
NPCX_HICTRL = 0xFF;
/* Normally Polarity IRQ1,12,11 type (level + high) setting */
NPCX_HIIRQC = 0x00; /* Make sure to default */
/*
* Init PORT80
* Enable Port80, Enable Port80 function & Interrupt & Read auto
*/
NPCX_DP80CTL = 0x29;
SET_BIT(NPCX_GLUE_SDP_CTS, 3);
SET_BIT(NPCX_GLUE_SDP_CTS, 0);
/* Just turn on IRQE */
NPCX_HIPMIE(PM_CHAN_1) = 0x01;
lpc_task_enable_irq();
/* Initialize host args and memory map to all zero */
memset(lpc_host_args, 0, sizeof(*lpc_host_args));
memset(lpc_get_memmap_range(), 0, EC_MEMMAP_SIZE);
/* We support LPC args and version 3 protocol */
*(lpc_get_memmap_range() + EC_MEMMAP_HOST_CMD_FLAGS) =
EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED |
EC_HOST_CMD_FLAG_VERSION_3;
/* Restore event masks if needed */
lpc_post_sysjump();
/* Sufficiently initialized */
init_done = 1;
/* Update host events now that we can copy them to memmap */
update_host_event_status();
/* initial IO port address via SIB-write modules */
system_lpc_host_register_init();
}
static void lpc_init(void)
{
/* Enable LPC clock in run and sleep modes. */
clock_enable_peripheral(CGC_OFFSET_LPC, 0x1,
CGC_MODE_RUN | CGC_MODE_SLEEP);
LM4_LPC_LPCIM = 0;
LM4_LPC_LPCCTL = 0;
LM4_LPC_LPCIRQCTL = 0;
/* Configure GPIOs */
gpio_config_module(MODULE_LPC, 1);
/*
* Set LPC channel 0 to I/O address 0x62 (data) / 0x66 (command),
* single endpoint, offset 0 for host command/writes and 1 for EC
* data writes, pool bytes 0(data)/1(cmd)
*/
LM4_LPC_ADR(LPC_CH_ACPI) = EC_LPC_ADDR_ACPI_DATA;
LM4_LPC_CTL(LPC_CH_ACPI) = (LPC_POOL_OFFS_ACPI << (5 - 1));
LM4_LPC_ST(LPC_CH_ACPI) = 0;
/* Unmask interrupt for host command and data writes */
LM4_LPC_LPCIM |= LM4_LPC_INT_MASK(LPC_CH_ACPI, 6);
/*
* Set LPC channel 1 to I/O address 0x80 (data), single endpoint,
* pool bytes 4(data)/5(cmd).
*/
LM4_LPC_ADR(LPC_CH_PORT80) = 0x80;
LM4_LPC_CTL(LPC_CH_PORT80) = (LPC_POOL_OFFS_PORT80 << (5 - 1));
/* Unmask interrupt for host data writes */
LM4_LPC_LPCIM |= LM4_LPC_INT_MASK(LPC_CH_PORT80, 2);
/*
* Set LPC channel 2 to I/O address 0x880, range endpoint,
* arbitration disabled, pool bytes 512-639. To access this from
* x86, use the following command to set GEN_LPC2:
*
* pci_write32 0 0x1f 0 0x88 0x007c0801
*/
LM4_LPC_ADR(LPC_CH_CMD_DATA) = EC_LPC_ADDR_HOST_ARGS;
LM4_LPC_CTL(LPC_CH_CMD_DATA) = 0x8019 |
(LPC_POOL_OFFS_CMD_DATA << (5 - 1));
/*
* Set LPC channel 3 to I/O address 0x60 (data) / 0x64 (command),
* single endpoint, offset 0 for host command/writes and 1 for EC
* data writes, pool bytes 0(data)/1(cmd)
*/
LM4_LPC_ADR(LPC_CH_KEYBOARD) = 0x60;
LM4_LPC_CTL(LPC_CH_KEYBOARD) = (1 << 24/* IRQSEL1 */) |
(0 << 18/* IRQEN1 */) | (LPC_POOL_OFFS_KEYBOARD << (5 - 1));
LM4_LPC_ST(LPC_CH_KEYBOARD) = 0;
/* Unmask interrupt for host command/data writes and data reads */
LM4_LPC_LPCIM |= LM4_LPC_INT_MASK(LPC_CH_KEYBOARD, 7);
/*
* Set LPC channel 4 to I/O address 0x200 (data) / 0x204 (command),
* single endpoint, offset 0 for host command/writes and 1 for EC
* data writes, pool bytes 0(data)/1(cmd)
*/
LM4_LPC_ADR(LPC_CH_CMD) = EC_LPC_ADDR_HOST_DATA;
LM4_LPC_CTL(LPC_CH_CMD) = (LPC_POOL_OFFS_CMD << (5 - 1));
/*
* Initialize status bits to 0. We never set the ACPI burst status bit,
* so this guarantees that at least one status bit will always be 0.
* This is used by comm_lpc.c to detect that the EC is present on the
* LPC bus. See crosbug.com/p/10963.
*/
LM4_LPC_ST(LPC_CH_CMD) = 0;
/* Unmask interrupt for host command writes */
LM4_LPC_LPCIM |= LM4_LPC_INT_MASK(LPC_CH_CMD, 4);
/*
* Set LPC channel 5 to I/O address 0x900, range endpoint,
* arbitration enabled, pool bytes 768-1023. To access this from
* x86, use the following command to set GEN_LPC3:
*
* pci_write32 0 0x1f 0 0x8c 0x007c0901
*/
LM4_LPC_ADR(LPC_CH_MEMMAP) = EC_LPC_ADDR_MEMMAP;
LM4_LPC_CTL(LPC_CH_MEMMAP) = 0x0019 | (LPC_POOL_OFFS_MEMMAP << (5 - 1));
#ifdef CONFIG_UART_HOST
/*
* Set LPC channel 7 to COM port I/O address. Note that channel 7
* ignores the TYPE bit and is always an 8-byte range.
*/
LM4_LPC_ADR(LPC_CH_COMX) = LPC_COMX_ADDR;
/*
* In theory we could configure IRQSELs and set IRQEN2/CX, and then the
* host could enable IRQs on its own. So far that hasn't been
* necessary, and due to the issues with IRQs (see wait_irq_sent()
* above) it might not work anyway.
*/
LM4_LPC_CTL(LPC_CH_COMX) = 0x0004 | (LPC_POOL_OFFS_COMX << (5 - 1));
/* Enable COMx emulation for reads and writes. */
LM4_LPC_LPCDMACX = 0x00310000;
/*
* Unmask interrupt for host data writes. We don't need interrupts for
* reads, because there's no flow control in that direction; LPC is
* much faster than the UART, and the UART doesn't have anywhere
* sensible to buffer input anyway.
*/
LM4_LPC_LPCIM |= LM4_LPC_INT_MASK(LPC_CH_COMX, 2);
#endif /* CONFIG_UART_HOST */
/*
* Unmaksk LPC bus reset interrupt. This lets us monitor the PCH
* PLTRST# signal for debugging.
*/
LM4_LPC_LPCIM |= (1 << 31);
/* Enable LPC channels */
LM4_LPC_LPCCTL = LM4_LPC_SCI_CLK_1 |
(1 << LPC_CH_ACPI) |
(1 << LPC_CH_PORT80) |
(1 << LPC_CH_CMD_DATA) |
(1 << LPC_CH_KEYBOARD) |
(1 << LPC_CH_CMD) |
(1 << LPC_CH_MEMMAP);
#ifdef CONFIG_UART_HOST
LM4_LPC_LPCCTL |= 1 << LPC_CH_COMX;
#endif
/*
* Ensure the EC (slave) has control of the memory-mapped I/O space.
* Once the EC has won arbtration for the memory-mapped space, it will
* keep control of it until it writes the last byte in the space.
* (That never happens; we can't use the last byte in the space because
* ACPI can't see it anyway.)
*/
while (!(LM4_LPC_ST(LPC_CH_MEMMAP) & 0x10)) {
/* Clear HW1ST */
LM4_LPC_ST(LPC_CH_MEMMAP) &= ~0x40;
/* Do a dummy slave write; this should cause SW1ST to be set */
*LPC_POOL_MEMMAP = *LPC_POOL_MEMMAP;
}
/* Initialize host args and memory map to all zero */
memset(lpc_host_args, 0, sizeof(*lpc_host_args));
memset(lpc_get_memmap_range(), 0, EC_MEMMAP_SIZE);
/* We support LPC args and version 3 protocol */
*(lpc_get_memmap_range() + EC_MEMMAP_HOST_CMD_FLAGS) =
EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED |
EC_HOST_CMD_FLAG_VERSION_3;
/* Enable LPC interrupt */
task_enable_irq(LM4_IRQ_LPC);
#ifdef CONFIG_UART_HOST
/* Enable COMx UART */
uart_comx_enable();
#endif
/* Restore event masks if needed */
lpc_post_sysjump();
/* Sufficiently initialized */
init_done = 1;
/* Update host events now that we can copy them to memmap */
update_host_event_status();
}
static void lpc_init(void)
{
enum ec2i_message ec2i_r;
/* SPI slave interface is disabled */
IT83XX_GCTRL_SSCR = 0;
/*
* DLM 52k~56k size select enable.
* For mapping LPC I/O cycle 800h ~ 9FFh to DLM 8D800 ~ 8D9FF.
*/
IT83XX_GCTRL_MCCR2 |= 0x10;
/* The register pair to access PNPCFG is 004Eh and 004Fh */
IT83XX_GCTRL_BADRSEL = 0x01;
/* Disable KBC IRQ */
IT83XX_KBC_KBIRQR = 0x00;
/*
* bit2, Output Buffer Empty CPU Interrupt Enable.
* bit3, Input Buffer Full CPU Interrupt Enable.
* bit5, IBF/OBF EC clear mode.
* 0b: IBF cleared if EC read data register, EC reset, or host reset.
* OBF cleared if host read data register, or EC reset.
* 1b: IBF cleared if EC write-1 to bit7 at related registers,
* EC reset, or host reset.
* OBF cleared if host read data register, EC write-1 to bit6 at
* related registers, or EC reset.
*/
IT83XX_KBC_KBHICR |= 0x2C;
/* PM1 Input Buffer Full Interrupt Enable for 62h/66 port */
pm_set_ctrl(LPC_ACPI_CMD, PM_CTRL_IBFIE, 1);
/* PM2 Input Buffer Full Interrupt Enable for 200h/204 port */
pm_set_ctrl(LPC_HOST_CMD, PM_CTRL_IBFIE, 1);
memset(lpc_get_memmap_range(), 0, EC_MEMMAP_SIZE);
memset(lpc_host_args, 0, sizeof(*lpc_host_args));
/* Host LPC I/O cycle mapping to RAM */
/*
* bit[4], H2RAM through LPC IO cycle.
* bit[1], H2RAM window 1 enabled.
* bit[0], H2RAM window 0 enabled.
*/
IT83XX_SMFI_HRAMWC |= 0x13;
/*
* bit[7:6]
* Host RAM Window[x] Read Protect Enable
* 00b: Disabled
* 01b: Lower half of RAM window protected
* 10b: Upper half of RAM window protected
* 11b: All protected
*
* bit[5:4]
* Host RAM Window[x] Write Protect Enable
* 00b: Disabled
* 01b: Lower half of RAM window protected
* 10b: Upper half of RAM window protected
* 11b: All protected
*
* bit[2:0]
* Host RAM Window 1 Size (HRAMW1S)
* 0h: 16 bytes
* 1h: 32 bytes
* 2h: 64 bytes
* 3h: 128 bytes
* 4h: 256 bytes
* 5h: 512 bytes
* 6h: 1024 bytes
* 7h: 2048 bytes
*/
/* H2RAM Win 0 Base Address 800h allow r/w for host_cmd_memmap */
IT83XX_SMFI_HRAMW0BA = 0x80;
IT83XX_SMFI_HRAMW0AAS = 0x04;
/* H2RAM Win 1 Base Address 900h allow r for acpi_ec_memmap */
IT83XX_SMFI_HRAMW1BA = 0x90;
IT83XX_SMFI_HRAMW1AAS = 0x34;
/* We support LPC args and version 3 protocol */
*(lpc_get_memmap_range() + EC_MEMMAP_HOST_CMD_FLAGS) =
EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED |
EC_HOST_CMD_FLAG_VERSION_3;
/*
* bit[5], Dedicated interrupt
* INT3: PMC1 Output Buffer Empty Int
* INT25: PMC1 Input Buffer Full Int
* INT26: PMC2 Output Buffer Empty Int
* INT27: PMC2 Input Buffer Full Int
*/
IT83XX_PMC_MBXCTRL |= 0x20;
/* PM3 Input Buffer Full Interrupt Enable for 80h port */
pm_set_ctrl(LPC_HOST_PORT_80H, PM_CTRL_IBFIE, 1);
p80l_index = P80L_P80LC;
if (ec2i_write(HOST_INDEX_LDN, LDN_RTCT) == EC2I_WRITE_SUCCESS) {
/* get P80L current index */
ec2i_r = ec2i_read(HOST_INDEX_DSLDC6);
/* read OK */
if ((ec2i_r & 0xff00) == EC2I_READ_SUCCESS)
p80l_index = ec2i_r & P80L_BRAM_BANK1_SIZE_MASK;
}
/*
* bit[7], enable P80L function.
* bit[6], accept port 80h cycle.
* bit[1-0], 10b: I2EC is read-only.
*/
IT83XX_GCTRL_SPCTRL1 |= 0xC2;
gpio_enable_interrupt(GPIO_PCH_PLTRST_L);
task_clear_pending_irq(IT83XX_IRQ_KBC_OUT);
task_disable_irq(IT83XX_IRQ_KBC_OUT);
task_clear_pending_irq(IT83XX_IRQ_KBC_IN);
task_enable_irq(IT83XX_IRQ_KBC_IN);
task_clear_pending_irq(IT83XX_IRQ_PMC_IN);
pm_set_status(LPC_ACPI_CMD, EC_LPC_STATUS_PROCESSING, 0);
task_enable_irq(IT83XX_IRQ_PMC_IN);
task_clear_pending_irq(IT83XX_IRQ_PMC2_IN);
pm_set_status(LPC_HOST_CMD, EC_LPC_STATUS_PROCESSING, 0);
task_enable_irq(IT83XX_IRQ_PMC2_IN);
task_clear_pending_irq(IT83XX_IRQ_PMC3_IN);
task_enable_irq(IT83XX_IRQ_PMC3_IN);
/* Restore event masks if needed */
lpc_post_sysjump();
/* Sufficiently initialized */
init_done = 1;
/* Update host events now that we can copy them to memmap */
update_host_event_status();
}