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path: root/drivers/i2c/busses/i2c-xgene-slimpro.c
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Diffstat (limited to 'drivers/i2c/busses/i2c-xgene-slimpro.c')
-rw-r--r--drivers/i2c/busses/i2c-xgene-slimpro.c105
1 files changed, 28 insertions, 77 deletions
diff --git a/drivers/i2c/busses/i2c-xgene-slimpro.c b/drivers/i2c/busses/i2c-xgene-slimpro.c
index bba08cbce6e1..b29dec66b2c3 100644
--- a/drivers/i2c/busses/i2c-xgene-slimpro.c
+++ b/drivers/i2c/busses/i2c-xgene-slimpro.c
@@ -91,25 +91,16 @@
#define SLIMPRO_IIC_MSG_DWORD_COUNT 3
-/* PCC related defines */
-#define PCC_SIGNATURE 0x50424300
-#define PCC_STS_CMD_COMPLETE BIT(0)
-#define PCC_STS_SCI_DOORBELL BIT(1)
-#define PCC_STS_ERR BIT(2)
-#define PCC_STS_PLAT_NOTIFY BIT(3)
-#define PCC_CMD_GENERATE_DB_INT BIT(15)
-
struct slimpro_i2c_dev {
struct i2c_adapter adapter;
struct device *dev;
struct mbox_chan *mbox_chan;
+ struct pcc_mbox_chan *pcc_chan;
struct mbox_client mbox_client;
int mbox_idx;
struct completion rd_complete;
u8 dma_buffer[I2C_SMBUS_BLOCK_MAX + 1]; /* dma_buffer[0] is used for length */
u32 *resp_msg;
- phys_addr_t comm_base_addr;
- void *pcc_comm_addr;
};
#define to_slimpro_i2c_dev(cl) \
@@ -155,15 +146,16 @@ static void slimpro_i2c_rx_cb(struct mbox_client *cl, void *mssg)
static void slimpro_i2c_pcc_rx_cb(struct mbox_client *cl, void *msg)
{
struct slimpro_i2c_dev *ctx = to_slimpro_i2c_dev(cl);
- struct acpi_pcct_shared_memory *generic_comm_base = ctx->pcc_comm_addr;
+ struct acpi_pcct_shared_memory __iomem *generic_comm_base =
+ ctx->pcc_chan->shmem;
/* Check if platform sends interrupt */
if (!xgene_word_tst_and_clr(&generic_comm_base->status,
- PCC_STS_SCI_DOORBELL))
+ PCC_STATUS_SCI_DOORBELL))
return;
if (xgene_word_tst_and_clr(&generic_comm_base->status,
- PCC_STS_CMD_COMPLETE)) {
+ PCC_STATUS_CMD_COMPLETE)) {
msg = generic_comm_base + 1;
/* Response message msg[1] contains the return value. */
@@ -176,7 +168,8 @@ static void slimpro_i2c_pcc_rx_cb(struct mbox_client *cl, void *msg)
static void slimpro_i2c_pcc_tx_prepare(struct slimpro_i2c_dev *ctx, u32 *msg)
{
- struct acpi_pcct_shared_memory *generic_comm_base = ctx->pcc_comm_addr;
+ struct acpi_pcct_shared_memory __iomem *generic_comm_base =
+ ctx->pcc_chan->shmem;
u32 *ptr = (void *)(generic_comm_base + 1);
u16 status;
int i;
@@ -185,10 +178,10 @@ static void slimpro_i2c_pcc_tx_prepare(struct slimpro_i2c_dev *ctx, u32 *msg)
cpu_to_le32(PCC_SIGNATURE | ctx->mbox_idx));
WRITE_ONCE(generic_comm_base->command,
- cpu_to_le16(SLIMPRO_MSG_TYPE(msg[0]) | PCC_CMD_GENERATE_DB_INT));
+ cpu_to_le16(SLIMPRO_MSG_TYPE(msg[0]) | PCC_CMD_GENERATE_DB_INTR));
status = le16_to_cpu(READ_ONCE(generic_comm_base->status));
- status &= ~PCC_STS_CMD_COMPLETE;
+ status &= ~PCC_STATUS_CMD_COMPLETE;
WRITE_ONCE(generic_comm_base->status, cpu_to_le16(status));
/* Copy the message to the PCC comm space */
@@ -307,6 +300,9 @@ static int slimpro_i2c_blkwr(struct slimpro_i2c_dev *ctx, u32 chip,
u32 msg[3];
int rc;
+ if (writelen > I2C_SMBUS_BLOCK_MAX)
+ return -EINVAL;
+
memcpy(ctx->dma_buffer, data, writelen);
paddr = dma_map_single(ctx->dev, ctx->dma_buffer, writelen,
DMA_TO_DEVICE);
@@ -461,81 +457,38 @@ static int xgene_slimpro_i2c_probe(struct platform_device *pdev)
cl->tx_block = true;
cl->rx_callback = slimpro_i2c_rx_cb;
ctx->mbox_chan = mbox_request_channel(cl, MAILBOX_I2C_INDEX);
- if (IS_ERR(ctx->mbox_chan)) {
- dev_err(&pdev->dev, "i2c mailbox channel request failed\n");
- return PTR_ERR(ctx->mbox_chan);
- }
+ if (IS_ERR(ctx->mbox_chan))
+ return dev_err_probe(&pdev->dev, PTR_ERR(ctx->mbox_chan),
+ "i2c mailbox channel request failed\n");
} else {
- struct acpi_pcct_hw_reduced *cppc_ss;
+ struct pcc_mbox_chan *pcc_chan;
const struct acpi_device_id *acpi_id;
- int version = XGENE_SLIMPRO_I2C_V1;
acpi_id = acpi_match_device(pdev->dev.driver->acpi_match_table,
&pdev->dev);
if (!acpi_id)
return -EINVAL;
- version = (int)acpi_id->driver_data;
-
if (device_property_read_u32(&pdev->dev, "pcc-channel",
&ctx->mbox_idx))
ctx->mbox_idx = MAILBOX_I2C_INDEX;
cl->tx_block = false;
cl->rx_callback = slimpro_i2c_pcc_rx_cb;
- ctx->mbox_chan = pcc_mbox_request_channel(cl, ctx->mbox_idx);
- if (IS_ERR(ctx->mbox_chan)) {
- dev_err(&pdev->dev, "PCC mailbox channel request failed\n");
- return PTR_ERR(ctx->mbox_chan);
- }
+ pcc_chan = pcc_mbox_request_channel(cl, ctx->mbox_idx);
+ if (IS_ERR(pcc_chan))
+ return dev_err_probe(&pdev->dev, PTR_ERR(pcc_chan),
+ "PCC mailbox channel request failed\n");
- /*
- * The PCC mailbox controller driver should
- * have parsed the PCCT (global table of all
- * PCC channels) and stored pointers to the
- * subspace communication region in con_priv.
- */
- cppc_ss = ctx->mbox_chan->con_priv;
- if (!cppc_ss) {
- dev_err(&pdev->dev, "PPC subspace not found\n");
- rc = -ENOENT;
- goto mbox_err;
- }
+ ctx->pcc_chan = pcc_chan;
+ ctx->mbox_chan = pcc_chan->mchan;
if (!ctx->mbox_chan->mbox->txdone_irq) {
- dev_err(&pdev->dev, "PCC IRQ not supported\n");
- rc = -ENOENT;
+ rc = dev_err_probe(&pdev->dev, -ENOENT,
+ "PCC IRQ not supported\n");
goto mbox_err;
}
- /*
- * This is the shared communication region
- * for the OS and Platform to communicate over.
- */
- ctx->comm_base_addr = cppc_ss->base_address;
- if (ctx->comm_base_addr) {
- if (version == XGENE_SLIMPRO_I2C_V2)
- ctx->pcc_comm_addr = memremap(
- ctx->comm_base_addr,
- cppc_ss->length,
- MEMREMAP_WT);
- else
- ctx->pcc_comm_addr = memremap(
- ctx->comm_base_addr,
- cppc_ss->length,
- MEMREMAP_WB);
- } else {
- dev_err(&pdev->dev, "Failed to get PCC comm region\n");
- rc = -ENOENT;
- goto mbox_err;
- }
-
- if (!ctx->pcc_comm_addr) {
- dev_err(&pdev->dev,
- "Failed to ioremap PCC comm region\n");
- rc = -ENOMEM;
- goto mbox_err;
- }
}
rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (rc)
@@ -561,12 +514,12 @@ mbox_err:
if (acpi_disabled)
mbox_free_channel(ctx->mbox_chan);
else
- pcc_mbox_free_channel(ctx->mbox_chan);
+ pcc_mbox_free_channel(ctx->pcc_chan);
return rc;
}
-static int xgene_slimpro_i2c_remove(struct platform_device *pdev)
+static void xgene_slimpro_i2c_remove(struct platform_device *pdev)
{
struct slimpro_i2c_dev *ctx = platform_get_drvdata(pdev);
@@ -575,9 +528,7 @@ static int xgene_slimpro_i2c_remove(struct platform_device *pdev)
if (acpi_disabled)
mbox_free_channel(ctx->mbox_chan);
else
- pcc_mbox_free_channel(ctx->mbox_chan);
-
- return 0;
+ pcc_mbox_free_channel(ctx->pcc_chan);
}
static const struct of_device_id xgene_slimpro_i2c_dt_ids[] = {
@@ -597,7 +548,7 @@ MODULE_DEVICE_TABLE(acpi, xgene_slimpro_i2c_acpi_ids);
static struct platform_driver xgene_slimpro_i2c_driver = {
.probe = xgene_slimpro_i2c_probe,
- .remove = xgene_slimpro_i2c_remove,
+ .remove = xgene_slimpro_i2c_remove,
.driver = {
.name = "xgene-slimpro-i2c",
.of_match_table = of_match_ptr(xgene_slimpro_i2c_dt_ids),
generated by cgit (git 2.34.1) at 2025-12-28 14:03:57 +0000