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mec1322: Setup EMI unit at base address 0x800

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Use EMI unit for access to host command / memmap data.

BUG=chrome-os-partner:38224
TEST=Manual on glower. Verify system boots + ectool works.
BRANCH=None

Change-Id: I06768a68fdf43f09d5e7425c293efff6a69a8878
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/264454
Reviewed-by: Randall Spangler <rspangler@chromium.org>
This commit is contained in:
Shawn Nematbakhsh
2015-04-07 14:32:22 -07:00
committed by ChromeOS Commit Bot
parent 2e19bcb0cf
commit 52791fc2ac
1 changed files with 12 additions and 3 deletions
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15
chip/mec1322/lpc.c
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@@ -36,7 +36,6 @@ static int init_done;
static struct ec_lpc_host_args * const lpc_host_args =
(struct ec_lpc_host_args *)mem_mapped;
#ifdef CONFIG_KEYBOARD_IRQ_GPIO
static void keyboard_irq_assert(void)
{
@@ -224,12 +223,22 @@ static void setup_lpc(void)
/* TODO(crosbug.com/p/24107): Route KIRQ to SER_IRQ1 */
/* Set up EMI module for memory mapped region and port 80 */
MEC1322_LPC_EMI_BAR = 0x0080800f;
/* 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;
/* We support LPC args and version 3 protocol */
*(lpc_get_memmap_range() + EC_MEMMAP_HOST_CMD_FLAGS) =
EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED |