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Wed, 5 Jun 2024 21:23:15 +0000 (GMT) From: Eddie James To: linux-fsi@lists.ozlabs.org Cc: eajames@linux.ibm.com, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, linux-spi@vger.kernel.org, broonie@kernel.org, andi.shyti@kernel.org, joel@jms.id.au, alistair@popple.id.au, jk@ozlabs.org, andrew@codeconstruct.com.au, linux-aspeed@lists.ozlabs.org, ninad@linux.ibm.com, lakshmiy@us.ibm.com Subject: [PATCH v4 09/40] fsi: aspeed: Add AST2700 support Date: Wed, 5 Jun 2024 16:22:41 -0500 Message-Id: <20240605212312.349188-10-eajames@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20240605212312.349188-1-eajames@linux.ibm.com> References: <20240605212312.349188-1-eajames@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: CMwTXUnHhq8T8B3lnqOzXQTyIJaOrBdC X-Proofpoint-ORIG-GUID: CMwTXUnHhq8T8B3lnqOzXQTyIJaOrBdC X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-06-05_02,2024-06-05_02,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 mlxlogscore=999 impostorscore=0 adultscore=0 bulkscore=0 malwarescore=0 clxscore=1015 mlxscore=0 suspectscore=0 lowpriorityscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2405010000 definitions=main-2406050160 AST2700 requires a few bits set differently in the OPB retry counter register, so add some match data and set the register accordingly. Signed-off-by: Eddie James --- drivers/fsi/fsi-master-aspeed.c | 33 ++++++++++++++++++++++++++++++--- 1 file changed, 30 insertions(+), 3 deletions(-) diff --git a/drivers/fsi/fsi-master-aspeed.c b/drivers/fsi/fsi-master-aspeed.c index f0a19cd451a07..3d15e867237df 100644 --- a/drivers/fsi/fsi-master-aspeed.c +++ b/drivers/fsi/fsi-master-aspeed.c @@ -18,6 +18,10 @@ #include "fsi-master.h" +struct fsi_master_aspeed_data { + u32 opb_retry_counter; +}; + struct fsi_master_aspeed { struct fsi_master master; struct mutex lock; /* protect HW access */ @@ -81,6 +85,13 @@ static const u32 fsi_base = 0xa0000000; #define XFER_HALFWORD (BIT(0)) #define XFER_BYTE (0) +/* OPB_RETRY_COUNTER */ +#define OPB_RC_FSI_OPB BIT(19) /* Access FSI space over OPB, not AHB (AST27xx+) */ +#define OPB_RC_CTRL_OPB BIT(18) /* Access controller over OPB, not AHB (AST27xx+) */ +#define OPB_RC_XFER_ACK_EN BIT(16) /* Enable OPBx xfer ack bit without mask */ +#define OPB_RC_COUNT GENMASK(15, 0) /* Number of retries */ +#define OPB_RC_DEFAULT 0x10 + #define CREATE_TRACE_POINTS #include @@ -536,6 +547,8 @@ static int tacoma_cabled_fsi_fixup(struct device *dev) static int fsi_master_aspeed_probe(struct platform_device *pdev) { + const struct fsi_master_aspeed_data *md = of_device_get_match_data(&pdev->dev); + u32 opb_retry_counter = md ? md->opb_retry_counter : OPB_RC_DEFAULT; struct fsi_master_aspeed *aspeed; int rc, links, reg; __be32 raw; @@ -579,8 +592,7 @@ static int fsi_master_aspeed_probe(struct platform_device *pdev) writel(OPB1_XFER_ACK_EN | OPB0_XFER_ACK_EN, aspeed->base + OPB_IRQ_MASK); - /* TODO: determine an appropriate value */ - writel(0x10, aspeed->base + OPB_RETRY_COUNTER); + writel(opb_retry_counter, aspeed->base + OPB_RETRY_COUNTER); writel(ctrl_base, aspeed->base + OPB_CTRL_BASE); writel(fsi_base, aspeed->base + OPB_FSI_BASE); @@ -656,8 +668,23 @@ static int fsi_master_aspeed_remove(struct platform_device *pdev) return 0; } +static const struct fsi_master_aspeed_data fsi_master_ast2600_data = { + .opb_retry_counter = OPB_RC_DEFAULT, +}; + +static const struct fsi_master_aspeed_data fsi_master_ast2700_data = { + .opb_retry_counter = OPB_RC_FSI_OPB | OPB_RC_CTRL_OPB | OPB_RC_DEFAULT, +}; + static const struct of_device_id fsi_master_aspeed_match[] = { - { .compatible = "aspeed,ast2600-fsi-master" }, + { + .compatible = "aspeed,ast2600-fsi-master", + .data = &fsi_master_ast2600_data, + }, + { + .compatible = "aspeed,ast2700-fsi-master", + .data = &fsi_master_ast2700_data, + }, { }, }; MODULE_DEVICE_TABLE(of, fsi_master_aspeed_match);