[PATCH v3 03/20] ram: k3-ddrss: Add support for multiple instances of DDR subsystems
Aswath Govindraju
a-govindraju at ti.com
Tue Jan 18 08:27:50 CET 2022
The current driver only supports single instance of DRR subsystem. Add
support for probing multiple instances of DDR subsystem.
Signed-off-by: Aswath Govindraju <a-govindraju at ti.com>
---
drivers/ram/k3-ddrss/k3-ddrss.c | 138 ++++++++++++++++++++------------
1 file changed, 87 insertions(+), 51 deletions(-)
diff --git a/drivers/ram/k3-ddrss/k3-ddrss.c b/drivers/ram/k3-ddrss/k3-ddrss.c
index 95b5cf9128b0..96084d0b83d9 100644
--- a/drivers/ram/k3-ddrss/k3-ddrss.c
+++ b/drivers/ram/k3-ddrss/k3-ddrss.c
@@ -30,6 +30,9 @@
#define DDRSS_V2A_R1_MAT_REG 0x0020
#define DDRSS_ECC_CTRL_REG 0x0120
+#define SINGLE_DDR_SUBSYSTEM 0x1
+#define MULTI_DDR_SUBSYSTEM 0x2
+
struct k3_ddrss_desc {
struct udevice *dev;
void __iomem *ddrss_ss_cfg;
@@ -42,14 +45,12 @@ struct k3_ddrss_desc {
u32 ddr_freq2;
u32 ddr_fhs_cnt;
struct udevice *vtt_supply;
+ u32 instance;
+ lpddr4_obj *driverdt;
+ lpddr4_config config;
+ lpddr4_privatedata pd;
};
-static lpddr4_obj *driverdt;
-static lpddr4_config config;
-static lpddr4_privatedata pd;
-
-static struct k3_ddrss_desc *ddrss;
-
struct reginitdata {
u32 ctl_regs[LPDDR4_INTR_CTL_REG_COUNT];
u16 ctl_regs_offs[LPDDR4_INTR_CTL_REG_COUNT];
@@ -83,15 +84,16 @@ struct reginitdata {
offset = offset * 10 + (*i - '0'); } \
} while (0)
-static u32 k3_lpddr4_read_ddr_type(void)
+static u32 k3_lpddr4_read_ddr_type(const lpddr4_privatedata *pd)
{
u32 status = 0U;
u32 offset = 0U;
u32 regval = 0U;
u32 dram_class = 0U;
+ struct k3_ddrss_desc *ddrss = (struct k3_ddrss_desc *)pd->ddr_instance;
TH_OFFSET_FROM_REG(LPDDR4__DRAM_CLASS__REG, CTL_SHIFT, offset);
- status = driverdt->readreg(&pd, LPDDR4_CTL_REGS, offset, ®val);
+ status = ddrss->driverdt->readreg(pd, LPDDR4_CTL_REGS, offset, ®val);
if (status > 0U) {
printf("%s: Failed to read DRAM_CLASS\n", __func__);
hang();
@@ -102,23 +104,23 @@ static u32 k3_lpddr4_read_ddr_type(void)
return dram_class;
}
-static void k3_lpddr4_freq_update(void)
+static void k3_lpddr4_freq_update(struct k3_ddrss_desc *ddrss)
{
unsigned int req_type, counter;
for (counter = 0; counter < ddrss->ddr_fhs_cnt; counter++) {
if (wait_for_bit_le32(ddrss->ddrss_ctrl_mmr +
- CTRLMMR_DDR4_FSP_CLKCHNG_REQ_OFFS, 0x80,
+ CTRLMMR_DDR4_FSP_CLKCHNG_REQ_OFFS + ddrss->instance * 0x10, 0x80,
true, 10000, false)) {
printf("Timeout during frequency handshake\n");
hang();
}
req_type = readl(ddrss->ddrss_ctrl_mmr +
- CTRLMMR_DDR4_FSP_CLKCHNG_REQ_OFFS) & 0x03;
+ CTRLMMR_DDR4_FSP_CLKCHNG_REQ_OFFS + ddrss->instance * 0x10) & 0x03;
- debug("%s: received freq change req: req type = %d, req no. = %d\n",
- __func__, req_type, counter);
+ debug("%s: received freq change req: req type = %d, req no. = %d, instance = %d\n",
+ __func__, req_type, counter, ddrss->instance);
if (req_type == 1)
clk_set_rate(&ddrss->ddr_clk, ddrss->ddr_freq1);
@@ -132,31 +134,32 @@ static void k3_lpddr4_freq_update(void)
printf("%s: Invalid freq request type\n", __func__);
writel(0x1, ddrss->ddrss_ctrl_mmr +
- CTRLMMR_DDR4_FSP_CLKCHNG_ACK_OFFS);
+ CTRLMMR_DDR4_FSP_CLKCHNG_ACK_OFFS + ddrss->instance * 0x10);
if (wait_for_bit_le32(ddrss->ddrss_ctrl_mmr +
- CTRLMMR_DDR4_FSP_CLKCHNG_REQ_OFFS, 0x80,
+ CTRLMMR_DDR4_FSP_CLKCHNG_REQ_OFFS + ddrss->instance * 0x10, 0x80,
false, 10, false)) {
printf("Timeout during frequency handshake\n");
hang();
}
writel(0x0, ddrss->ddrss_ctrl_mmr +
- CTRLMMR_DDR4_FSP_CLKCHNG_ACK_OFFS);
+ CTRLMMR_DDR4_FSP_CLKCHNG_ACK_OFFS + ddrss->instance * 0x10);
}
}
-static void k3_lpddr4_ack_freq_upd_req(void)
+static void k3_lpddr4_ack_freq_upd_req(const lpddr4_privatedata *pd)
{
u32 dram_class;
+ struct k3_ddrss_desc *ddrss = (struct k3_ddrss_desc *)pd->ddr_instance;
debug("--->>> LPDDR4 Initialization is in progress ... <<<---\n");
- dram_class = k3_lpddr4_read_ddr_type();
+ dram_class = k3_lpddr4_read_ddr_type(pd);
switch (dram_class) {
case DENALI_CTL_0_DRAM_CLASS_DDR4:
break;
case DENALI_CTL_0_DRAM_CLASS_LPDDR4:
- k3_lpddr4_freq_update();
+ k3_lpddr4_freq_update(ddrss);
break;
default:
printf("Unrecognized dram_class cannot update frequency!\n");
@@ -167,8 +170,9 @@ static int k3_ddrss_init_freq(struct k3_ddrss_desc *ddrss)
{
u32 dram_class;
int ret;
+ lpddr4_privatedata *pd = &ddrss->pd;
- dram_class = k3_lpddr4_read_ddr_type();
+ dram_class = k3_lpddr4_read_ddr_type(pd);
switch (dram_class) {
case DENALI_CTL_0_DRAM_CLASS_DDR4:
@@ -196,7 +200,7 @@ static void k3_lpddr4_info_handler(const lpddr4_privatedata *pd,
lpddr4_infotype infotype)
{
if (infotype == LPDDR4_DRV_SOC_PLL_UPDATE)
- k3_lpddr4_ack_freq_upd_req();
+ k3_lpddr4_ack_freq_upd_req(pd);
}
static int k3_ddrss_power_on(struct k3_ddrss_desc *ddrss)
@@ -235,6 +239,7 @@ static int k3_ddrss_power_on(struct k3_ddrss_desc *ddrss)
static int k3_ddrss_ofdata_to_priv(struct udevice *dev)
{
struct k3_ddrss_desc *ddrss = dev_get_priv(dev);
+ struct k3_ddrss_data *ddrss_data = (struct k3_ddrss_data *)dev_get_driver_data(dev);
phys_addr_t reg;
int ret;
@@ -274,6 +279,17 @@ static int k3_ddrss_ofdata_to_priv(struct udevice *dev)
if (ret)
dev_err(dev, "clk get failed for osc clk %d\n", ret);
+ /* Reading instance number for multi ddr subystems */
+ if (ddrss_data->flags & MULTI_DDR_SUBSYSTEM) {
+ ret = dev_read_u32(dev, "instance", &ddrss->instance);
+ if (ret) {
+ dev_err(dev, "missing instance property");
+ return -EINVAL;
+ }
+ } else {
+ ddrss->instance = 0;
+ }
+
ret = dev_read_u32(dev, "ti,ddr-freq1", &ddrss->ddr_freq1);
if (ret)
dev_err(dev, "ddr freq1 not populated %d\n", ret);
@@ -289,12 +305,13 @@ static int k3_ddrss_ofdata_to_priv(struct udevice *dev)
return ret;
}
-void k3_lpddr4_probe(void)
+void k3_lpddr4_probe(struct k3_ddrss_desc *ddrss)
{
u32 status = 0U;
u16 configsize = 0U;
+ lpddr4_config *config = &ddrss->config;
- status = driverdt->probe(&config, &configsize);
+ status = ddrss->driverdt->probe(config, &configsize);
if ((status != 0) || (configsize != sizeof(lpddr4_privatedata))
|| (configsize > SRAM_MAX)) {
@@ -305,25 +322,30 @@ void k3_lpddr4_probe(void)
}
}
-void k3_lpddr4_init(void)
+void k3_lpddr4_init(struct k3_ddrss_desc *ddrss)
{
u32 status = 0U;
+ lpddr4_config *config = &ddrss->config;
+ lpddr4_obj *driverdt = ddrss->driverdt;
+ lpddr4_privatedata *pd = &ddrss->pd;
- if ((sizeof(pd) != sizeof(lpddr4_privatedata))
- || (sizeof(pd) > SRAM_MAX)) {
+ if ((sizeof(*pd) != sizeof(lpddr4_privatedata)) || (sizeof(*pd) > SRAM_MAX)) {
printf("%s: FAIL\n", __func__);
hang();
}
- config.ctlbase = (struct lpddr4_ctlregs_s *)ddrss->ddrss_ss_cfg;
- config.infohandler = (lpddr4_infocallback) k3_lpddr4_info_handler;
+ config->ctlbase = (struct lpddr4_ctlregs_s *)ddrss->ddrss_ss_cfg;
+ config->infohandler = (lpddr4_infocallback) k3_lpddr4_info_handler;
+
+ status = driverdt->init(pd, config);
- status = driverdt->init(&pd, &config);
+ /* linking ddr instance to lpddr4 */
+ pd->ddr_instance = (void *)ddrss;
if ((status > 0U) ||
- (pd.ctlbase != (struct lpddr4_ctlregs_s *)config.ctlbase) ||
- (pd.ctlinterrupthandler != config.ctlinterrupthandler) ||
- (pd.phyindepinterrupthandler != config.phyindepinterrupthandler)) {
+ (pd->ctlbase != (struct lpddr4_ctlregs_s *)config->ctlbase) ||
+ (pd->ctlinterrupthandler != config->ctlinterrupthandler) ||
+ (pd->phyindepinterrupthandler != config->phyindepinterrupthandler)) {
printf("%s: FAIL\n", __func__);
hang();
} else {
@@ -331,7 +353,8 @@ void k3_lpddr4_init(void)
}
}
-void populate_data_array_from_dt(struct reginitdata *reginit_data)
+void populate_data_array_from_dt(struct k3_ddrss_desc *ddrss,
+ struct reginitdata *reginit_data)
{
int ret, i;
@@ -363,22 +386,24 @@ void populate_data_array_from_dt(struct reginitdata *reginit_data)
reginit_data->phy_regs_offs[i] = i;
}
-void k3_lpddr4_hardware_reg_init(void)
+void k3_lpddr4_hardware_reg_init(struct k3_ddrss_desc *ddrss)
{
u32 status = 0U;
struct reginitdata reginitdata;
+ lpddr4_obj *driverdt = ddrss->driverdt;
+ lpddr4_privatedata *pd = &ddrss->pd;
- populate_data_array_from_dt(®initdata);
+ populate_data_array_from_dt(ddrss, ®initdata);
- status = driverdt->writectlconfig(&pd, reginitdata.ctl_regs,
+ status = driverdt->writectlconfig(pd, reginitdata.ctl_regs,
reginitdata.ctl_regs_offs,
LPDDR4_INTR_CTL_REG_COUNT);
if (!status)
- status = driverdt->writephyindepconfig(&pd, reginitdata.pi_regs,
+ status = driverdt->writephyindepconfig(pd, reginitdata.pi_regs,
reginitdata.pi_regs_offs,
LPDDR4_INTR_PHY_INDEP_REG_COUNT);
if (!status)
- status = driverdt->writephyconfig(&pd, reginitdata.phy_regs,
+ status = driverdt->writephyconfig(pd, reginitdata.phy_regs,
reginitdata.phy_regs_offs,
LPDDR4_INTR_PHY_REG_COUNT);
if (status) {
@@ -387,27 +412,29 @@ void k3_lpddr4_hardware_reg_init(void)
}
}
-void k3_lpddr4_start(void)
+void k3_lpddr4_start(struct k3_ddrss_desc *ddrss)
{
u32 status = 0U;
u32 regval = 0U;
u32 offset = 0U;
+ lpddr4_obj *driverdt = ddrss->driverdt;
+ lpddr4_privatedata *pd = &ddrss->pd;
TH_OFFSET_FROM_REG(LPDDR4__START__REG, CTL_SHIFT, offset);
- status = driverdt->readreg(&pd, LPDDR4_CTL_REGS, offset, ®val);
+ status = driverdt->readreg(pd, LPDDR4_CTL_REGS, offset, ®val);
if ((status > 0U) || ((regval & TH_FLD_MASK(LPDDR4__START__FLD)) != 0U)) {
printf("%s: Pre start FAIL\n", __func__);
hang();
}
- status = driverdt->start(&pd);
+ status = driverdt->start(pd);
if (status > 0U) {
printf("%s: FAIL\n", __func__);
hang();
}
- status = driverdt->readreg(&pd, LPDDR4_CTL_REGS, offset, ®val);
+ status = driverdt->readreg(pd, LPDDR4_CTL_REGS, offset, ®val);
if ((status > 0U) || ((regval & TH_FLD_MASK(LPDDR4__START__FLD)) != 1U)) {
printf("%s: Post start FAIL\n", __func__);
hang();
@@ -419,8 +446,7 @@ void k3_lpddr4_start(void)
static int k3_ddrss_probe(struct udevice *dev)
{
int ret;
-
- ddrss = dev_get_priv(dev);
+ struct k3_ddrss_desc *ddrss = dev_get_priv(dev);
debug("%s(dev=%p)\n", __func__, dev);
@@ -439,16 +465,17 @@ static int k3_ddrss_probe(struct udevice *dev)
writel(0x0, ddrss->ddrss_ss_cfg + DDRSS_ECC_CTRL_REG);
#endif
- driverdt = lpddr4_getinstance();
- k3_lpddr4_probe();
- k3_lpddr4_init();
- k3_lpddr4_hardware_reg_init();
+ ddrss->driverdt = lpddr4_getinstance();
+
+ k3_lpddr4_probe(ddrss);
+ k3_lpddr4_init(ddrss);
+ k3_lpddr4_hardware_reg_init(ddrss);
ret = k3_ddrss_init_freq(ddrss);
if (ret)
return ret;
- k3_lpddr4_start();
+ k3_lpddr4_start(ddrss);
return ret;
}
@@ -462,9 +489,18 @@ static struct ram_ops k3_ddrss_ops = {
.get_info = k3_ddrss_get_info,
};
+static const struct k3_ddrss_data k3_data = {
+ .flags = SINGLE_DDR_SUBSYSTEM,
+};
+
+static const struct k3_ddrss_data j721s2_data = {
+ .flags = MULTI_DDR_SUBSYSTEM,
+};
+
static const struct udevice_id k3_ddrss_ids[] = {
- {.compatible = "ti,am64-ddrss"},
- {.compatible = "ti,j721e-ddrss"},
+ {.compatible = "ti,am64-ddrss", .data = (ulong)&k3_data, },
+ {.compatible = "ti,j721e-ddrss", .data = (ulong)&k3_data, },
+ {.compatible = "ti,j721s2-ddrss", .data = (ulong)&j721s2_data, },
{}
};
--
2.17.1
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