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authorSimon Glass <sjg@chromium.org>2019-12-06 21:42:48 -0700
committerBin Meng <bmeng.cn@gmail.com>2019-12-15 11:44:24 +0800
commit636555a4c4c96607613a7013b4b8536b10b5e8e4 (patch)
tree8314857a7a2036bb3cf68cbdc2c985372eed20dc
parent92842147c3113e83462fcad00fa5cd343c4b945e (diff)
spi: ich: Add TPL support
In TPL we want to reduce code size and support running with CONFIG_PCI disabled. Add special code to handle this using a fixed BAR programmed into the SPI on boot. Also cache the SPI flash to speed up boot. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
-rw-r--r--drivers/spi/ich.c48
1 files changed, 44 insertions, 4 deletions
diff --git a/drivers/spi/ich.c b/drivers/spi/ich.c
index 160ec370fd..0cd073c03c 100644
--- a/drivers/spi/ich.c
+++ b/drivers/spi/ich.c
@@ -19,8 +19,11 @@
#include <spi.h>
#include <spi_flash.h>
#include <spi-mem.h>
+#include <spl.h>
#include <asm/fast_spi.h>
#include <asm/io.h>
+#include <asm/mtrr.h>
+#include <linux/sizes.h>
#include "ich.h"
@@ -115,6 +118,8 @@ static bool ich9_can_do_33mhz(struct udevice *dev)
struct ich_spi_priv *priv = dev_get_priv(dev);
u32 fdod, speed;
+ if (!CONFIG_IS_ENABLED(PCI))
+ return false;
/* Observe SPI Descriptor Component Section 0 */
dm_pci_write_config32(priv->pch, 0xb0, 0x1000);
@@ -706,6 +711,15 @@ static int ich_init_controller(struct udevice *dev,
struct ich_spi_platdata *plat,
struct ich_spi_priv *ctlr)
{
+ if (spl_phase() == PHASE_TPL) {
+ struct ich_spi_platdata *plat = dev_get_platdata(dev);
+ int ret;
+
+ ret = fast_spi_early_init(plat->bdf, plat->mmio_base);
+ if (ret)
+ return ret;
+ }
+
ctlr->base = (void *)plat->mmio_base;
if (plat->ich_version == ICHV_7) {
struct ich7_spi_regs *ich7_spi = ctlr->base;
@@ -754,6 +768,26 @@ static int ich_init_controller(struct udevice *dev,
return 0;
}
+static int ich_cache_bios_region(struct udevice *dev)
+{
+ ulong map_base;
+ uint map_size;
+ uint offset;
+ ulong base;
+ int ret;
+
+ ret = ich_get_mmap_bus(dev, &map_base, &map_size, &offset);
+ if (ret)
+ return ret;
+
+ /* Don't use WRBACK since we are not supposed to write to SPI flash */
+ base = SZ_4G - map_size;
+ mtrr_set_next_var(MTRR_TYPE_WRPROT, base, map_size);
+ log_debug("BIOS cache base=%lx, size=%x\n", base, (uint)map_size);
+
+ return 0;
+}
+
static int ich_spi_probe(struct udevice *dev)
{
struct ich_spi_platdata *plat = dev_get_platdata(dev);
@@ -764,10 +798,16 @@ static int ich_spi_probe(struct udevice *dev)
if (ret)
return ret;
- ret = ich_protect_lockdown(dev);
- if (ret)
- return ret;
-
+ if (spl_phase() == PHASE_TPL) {
+ /* Cache the BIOS to speed things up */
+ ret = ich_cache_bios_region(dev);
+ if (ret)
+ return ret;
+ } else {
+ ret = ich_protect_lockdown(dev);
+ if (ret)
+ return ret;
+ }
priv->cur_speed = priv->max_speed;
return 0;