From: ChiaWei Wang <chiawei_wang@aspeedtech.com>
To: Andrew Jeffery <andrew@aj.id.au>,
"openipmi-developer@lists.sourceforge.net"
<openipmi-developer@lists.sourceforge.net>,
"openbmc@lists.ozlabs.org" <openbmc@lists.ozlabs.org>,
"minyard@acm.org" <minyard@acm.org>
Cc: "joel@jms.id.au" <joel@jms.id.au>,
Ryan Chen <ryan_chen@aspeedtech.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"tmaimon77@gmail.com" <tmaimon77@gmail.com>,
"linux-aspeed@lists.ozlabs.org" <linux-aspeed@lists.ozlabs.org>,
"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
"avifishman70@gmail.com" <avifishman70@gmail.com>,
"venture@google.com" <venture@google.com>,
"linus.walleij@linaro.org" <linus.walleij@linaro.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"tali.perry1@gmail.com" <tali.perry1@gmail.com>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"lee.jones@linaro.org" <lee.jones@linaro.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"benjaminfair@google.com" <benjaminfair@google.com>
Subject: RE: [PATCH v2 21/21] ipmi: kcs_bmc_aspeed: Optionally apply status address
Date: Tue, 6 Apr 2021 06:09:12 +0000 [thread overview]
Message-ID: <HK0PR06MB3779BE4C5C6E2758DC60FDCA91769@HK0PR06MB3779.apcprd06.prod.outlook.com> (raw)
In-Reply-To: <20210319062752.145730-21-andrew@aj.id.au>
Reviewed-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
> -----Original Message-----
> From: Andrew Jeffery <andrew@aj.id.au>
> Sent: Friday, March 19, 2021 2:28 PM
> To: openipmi-developer@lists.sourceforge.net; openbmc@lists.ozlabs.org;
> minyard@acm.org
> Subject: [PATCH v2 21/21] ipmi: kcs_bmc_aspeed: Optionally apply status
> address
>
> Some Aspeed KCS devices can derive the status register address from the
> address of the data register. As such, the address of the status register can be
> implicit in the configuration if desired. On the other hand, sometimes address
> schemes might be requested that are incompatible with the default addressing
> scheme. Allow these requests where possible if the devicetree specifies the
> status register address.
>
> Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
> ---
> drivers/char/ipmi/kcs_bmc_aspeed.c | 113 +++++++++++++++++++++--------
> 1 file changed, 81 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c
> b/drivers/char/ipmi/kcs_bmc_aspeed.c
> index 7334b1f51dcc..98789b837690 100644
> --- a/drivers/char/ipmi/kcs_bmc_aspeed.c
> +++ b/drivers/char/ipmi/kcs_bmc_aspeed.c
> @@ -83,6 +83,8 @@
> #define LPC_STR2 0x040
> #define LPC_STR3 0x044
> #define LPC_HICRB 0x100
> +#define LPC_HICRB_EN16LADR2 BIT(5)
> +#define LPC_HICRB_EN16LADR1 BIT(4)
> #define LPC_HICRB_IBFIE4 BIT(1)
> #define LPC_HICRB_LPC4E BIT(0)
> #define LPC_HICRC 0x104
> @@ -96,6 +98,11 @@
> #define LPC_IDR4 0x114
> #define LPC_ODR4 0x118
> #define LPC_STR4 0x11C
> +#define LPC_LSADR12 0x120
> +#define LPC_LSADR12_LSADR2_MASK GENMASK(31, 16)
> +#define LPC_LSADR12_LSADR2_SHIFT 16
> +#define LPC_LSADR12_LSADR1_MASK GENMASK(15, 0)
> +#define LPC_LSADR12_LSADR1_SHIFT 0
>
> #define OBE_POLL_PERIOD (HZ / 2)
>
> @@ -123,7 +130,7 @@ struct aspeed_kcs_bmc {
>
> struct aspeed_kcs_of_ops {
> int (*get_channel)(struct platform_device *pdev);
> - int (*get_io_address)(struct platform_device *pdev);
> + int (*get_io_address)(struct platform_device *pdev, u32 addrs[2]);
> };
>
> static inline struct aspeed_kcs_bmc *to_aspeed_kcs_bmc(struct
> kcs_bmc_device *kcs_bmc) @@ -217,38 +224,64 @@ static void
> aspeed_kcs_updateb(struct kcs_bmc_device *kcs_bmc, u32 reg, u8 mask,
> * C. KCS4
> * D / C : CA4h / CA5h
> */
> -static void aspeed_kcs_set_address(struct kcs_bmc_device *kcs_bmc, u16
> addr)
> +static int aspeed_kcs_set_address(struct kcs_bmc_device *kcs_bmc, u32
> +addrs[2], int nr_addrs)
> {
> struct aspeed_kcs_bmc *priv = to_aspeed_kcs_bmc(kcs_bmc);
>
> - switch (kcs_bmc->channel) {
> + if (WARN_ON(nr_addrs < 1 || nr_addrs > 2))
> + return -EINVAL;
> +
> + switch (priv->kcs_bmc.channel) {
> case 1:
> - regmap_update_bits(priv->map, LPC_HICR4,
> - LPC_HICR4_LADR12AS, 0);
> - regmap_write(priv->map, LPC_LADR12H, addr >> 8);
> - regmap_write(priv->map, LPC_LADR12L, addr & 0xFF);
> + regmap_update_bits(priv->map, LPC_HICR4, LPC_HICR4_LADR12AS,
> 0);
> + regmap_write(priv->map, LPC_LADR12H, addrs[0] >> 8);
> + regmap_write(priv->map, LPC_LADR12L, addrs[0] & 0xFF);
> + if (nr_addrs == 2) {
> + regmap_update_bits(priv->map, LPC_LSADR12,
> LPC_LSADR12_LSADR1_MASK,
> + addrs[1] << LPC_LSADR12_LSADR1_SHIFT);
> +
> + regmap_update_bits(priv->map, LPC_HICRB,
> LPC_HICRB_EN16LADR1,
> + LPC_HICRB_EN16LADR1);
> + }
> break;
>
> case 2:
> - regmap_update_bits(priv->map, LPC_HICR4,
> - LPC_HICR4_LADR12AS, LPC_HICR4_LADR12AS);
> - regmap_write(priv->map, LPC_LADR12H, addr >> 8);
> - regmap_write(priv->map, LPC_LADR12L, addr & 0xFF);
> + regmap_update_bits(priv->map, LPC_HICR4, LPC_HICR4_LADR12AS,
> LPC_HICR4_LADR12AS);
> + regmap_write(priv->map, LPC_LADR12H, addrs[0] >> 8);
> + regmap_write(priv->map, LPC_LADR12L, addrs[0] & 0xFF);
> + if (nr_addrs == 2) {
> + regmap_update_bits(priv->map, LPC_LSADR12,
> LPC_LSADR12_LSADR2_MASK,
> + addrs[1] << LPC_LSADR12_LSADR2_SHIFT);
> +
> + regmap_update_bits(priv->map, LPC_HICRB,
> LPC_HICRB_EN16LADR2,
> + LPC_HICRB_EN16LADR2);
> + }
> break;
>
> case 3:
> - regmap_write(priv->map, LPC_LADR3H, addr >> 8);
> - regmap_write(priv->map, LPC_LADR3L, addr & 0xFF);
> + if (nr_addrs == 2) {
> + dev_err(priv->kcs_bmc.dev,
> + "Channel 3 only supports inferred status IO address\n");
> + return -EINVAL;
> + }
> +
> + regmap_write(priv->map, LPC_LADR3H, addrs[0] >> 8);
> + regmap_write(priv->map, LPC_LADR3L, addrs[0] & 0xFF);
> break;
>
> case 4:
> - regmap_write(priv->map, LPC_LADR4, ((addr + 1) << 16) |
> - addr);
> + if (nr_addrs == 1)
> + regmap_write(priv->map, LPC_LADR4, ((addrs[0] + 1) << 16) |
> addrs[0]);
> + else
> + regmap_write(priv->map, LPC_LADR4, (addrs[1] << 16) |
> addrs[0]);
> +
> break;
>
> default:
> - break;
> + return -EINVAL;
> }
> +
> + return 0;
> }
>
> static inline int aspeed_kcs_map_serirq_type(u32 dt_type) @@ -462,18
> +495,18 @@ static int aspeed_kcs_of_v1_get_channel(struct platform_device
> *pdev)
> return channel;
> }
>
> -static int aspeed_kcs_of_v1_get_io_address(struct platform_device *pdev)
> +static int
> +aspeed_kcs_of_v1_get_io_address(struct platform_device *pdev, u32
> +addrs[2])
> {
> - u32 slave;
> int rc;
>
> - rc = of_property_read_u32(pdev->dev.of_node, "kcs_addr", &slave);
> - if (rc || slave > 0xffff) {
> + rc = of_property_read_u32(pdev->dev.of_node, "kcs_addr", addrs);
> + if (rc || addrs[0] > 0xffff) {
> dev_err(&pdev->dev, "no valid 'kcs_addr' configured\n");
> return -EINVAL;
> }
>
> - return slave;
> + return 1;
> }
>
> static int aspeed_kcs_of_v2_get_channel(struct platform_device *pdev) @@
> -509,16 +542,27 @@ static int aspeed_kcs_of_v2_get_channel(struct
> platform_device *pdev)
> return -EINVAL;
> }
>
> -static int aspeed_kcs_of_v2_get_io_address(struct platform_device *pdev)
> +static int
> +aspeed_kcs_of_v2_get_io_address(struct platform_device *pdev, u32
> +addrs[2])
> {
> - uint32_t slave;
> int rc;
>
> - rc = of_property_read_u32(pdev->dev.of_node, "aspeed,lpc-io-reg",
> &slave);
> - if (rc || slave > 0xffff)
> + rc = of_property_read_variable_u32_array(pdev->dev.of_node,
> + "aspeed,lpc-io-reg",
> + addrs, 1, 2);
> + if (rc < 0)
> + return rc;
> +
> + if (WARN_ON(rc == 0))
> + return -EINVAL;
> +
> + if (addrs[0] > 0xffff)
> + return -EINVAL;
> +
> + if (rc == 2 && addrs[1] > 0xffff)
> return -EINVAL;
>
> - return slave;
> + return rc;
> }
>
> static int aspeed_kcs_probe(struct platform_device *pdev) @@ -527,9
> +571,11 @@ static int aspeed_kcs_probe(struct platform_device *pdev)
> struct kcs_bmc_device *kcs_bmc;
> struct aspeed_kcs_bmc *priv;
> struct device_node *np;
> - int rc, channel, addr;
> bool have_upstream_irq;
> u32 upstream_irq[2];
> + int rc, channel;
> + int nr_addrs;
> + u32 addrs[2];
>
> np = pdev->dev.of_node->parent;
> if (!of_device_is_compatible(np, "aspeed,ast2400-lpc-v2") && @@ -547,9
> +593,9 @@ static int aspeed_kcs_probe(struct platform_device *pdev)
> if (channel < 0)
> return channel;
>
> - addr = ops->get_io_address(pdev);
> - if (addr < 0)
> - return addr;
> + nr_addrs = ops->get_io_address(pdev, addrs);
> + if (nr_addrs < 0)
> + return nr_addrs;
>
> np = pdev->dev.of_node;
> rc = of_property_read_u32_array(np, "aspeed,lpc-interrupts",
> upstream_irq, 2); @@ -578,7 +624,9 @@ static int aspeed_kcs_probe(struct
> platform_device *pdev)
> priv->obe.remove = false;
> timer_setup(&priv->obe.timer, aspeed_kcs_check_obe, 0);
>
> - aspeed_kcs_set_address(kcs_bmc, addr);
> + rc = aspeed_kcs_set_address(kcs_bmc, addrs, nr_addrs);
> + if (rc)
> + return rc;
>
> /* Host to BMC IRQ */
> rc = aspeed_kcs_config_downstream_irq(kcs_bmc, pdev); @@ -600,7
> +648,8 @@ static int aspeed_kcs_probe(struct platform_device *pdev)
> if (rc < 0)
> return rc;
>
> - dev_info(&pdev->dev, "Initialised channel %d at 0x%x\n",
> kcs_bmc->channel, addr);
> + dev_info(&pdev->dev, "Initialised channel %d at 0x%x\n",
> + kcs_bmc->channel, addrs[0]);
>
> return 0;
> }
> --
> 2.27.0
next prev parent reply other threads:[~2021-04-06 6:09 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-19 6:27 [PATCH v2 01/21] dt-bindings: aspeed-lpc: Remove LPC partitioning Andrew Jeffery
2021-03-19 6:27 ` [PATCH v2 02/21] ARM: dts: Remove LPC BMC and Host partitions Andrew Jeffery
2021-03-19 6:27 ` [PATCH v2 03/21] ipmi: kcs: aspeed: Adapt to new LPC DTS layout Andrew Jeffery
2021-04-09 3:35 ` Joel Stanley
2021-03-19 6:27 ` [PATCH v2 04/21] pinctrl: aspeed-g5: Adapt to new LPC device tree layout Andrew Jeffery
2021-04-09 3:36 ` Joel Stanley
2021-03-19 6:27 ` [PATCH v2 05/21] soc: aspeed: " Andrew Jeffery
2021-04-09 3:38 ` Joel Stanley
2021-03-19 6:27 ` [PATCH v2 06/21] ipmi: kcs_bmc_aspeed: Use of match data to extract KCS properties Andrew Jeffery
2021-04-06 6:07 ` ChiaWei Wang
2021-04-09 3:24 ` Zev Weiss
2021-03-19 6:27 ` [PATCH v2 07/21] ipmi: kcs_bmc: Make status update atomic Andrew Jeffery
2021-04-09 5:32 ` Zev Weiss
2021-03-19 6:27 ` [PATCH v2 08/21] ipmi: kcs_bmc: Rename {read,write}_{status,data}() functions Andrew Jeffery
2021-04-09 5:33 ` [PATCH v2 08/21] ipmi: kcs_bmc: Rename {read, write}_{status, data}() functions Zev Weiss
2021-03-19 6:27 ` [PATCH v2 09/21] ipmi: kcs_bmc: Split out kcs_bmc_cdev_ipmi Andrew Jeffery
2021-04-09 3:56 ` Zev Weiss
2021-04-09 5:48 ` Andrew Jeffery
2021-04-09 19:21 ` Zev Weiss
2021-03-19 6:27 ` [PATCH v2 10/21] ipmi: kcs_bmc: Turn the driver data-structures inside-out Andrew Jeffery
2021-04-09 3:57 ` Zev Weiss
2021-04-09 5:59 ` Andrew Jeffery
2021-04-09 6:25 ` Zev Weiss
2021-04-09 19:26 ` Zev Weiss
2021-04-11 23:00 ` Andrew Jeffery
2021-03-19 6:27 ` [PATCH v2 11/21] ipmi: kcs_bmc: Split headers into device and client Andrew Jeffery
2021-04-09 4:01 ` Zev Weiss
2021-04-09 6:06 ` Andrew Jeffery
2021-03-19 6:27 ` [PATCH v2 12/21] ipmi: kcs_bmc: Strip private client data from struct kcs_bmc Andrew Jeffery
2021-04-09 4:07 ` Zev Weiss
2021-04-09 6:15 ` Andrew Jeffery
2021-03-19 6:27 ` [PATCH v2 13/21] ipmi: kcs_bmc: Decouple the IPMI chardev from the core Andrew Jeffery
2021-04-06 6:07 ` ChiaWei Wang
2021-04-09 4:35 ` Zev Weiss
2021-04-09 6:24 ` Andrew Jeffery
2021-03-19 6:27 ` [PATCH v2 14/21] ipmi: kcs_bmc: Allow clients to control KCS IRQ state Andrew Jeffery
2021-04-09 4:37 ` Zev Weiss
2021-04-09 6:39 ` Andrew Jeffery
2021-03-19 6:27 ` [PATCH v2 15/21] ipmi: kcs_bmc: Don't enforce single-open policy in the kernel Andrew Jeffery
2021-04-09 5:07 ` Zev Weiss
2021-03-19 6:27 ` [PATCH v2 16/21] ipmi: kcs_bmc: Add a "raw" character device interface Andrew Jeffery
2021-04-09 5:17 ` Zev Weiss
2021-04-09 6:46 ` Andrew Jeffery
2021-04-09 7:55 ` Arnd Bergmann
2021-04-12 1:33 ` Andrew Jeffery
2021-04-12 8:48 ` Arnd Bergmann
2021-04-12 23:45 ` Andrew Jeffery
2021-04-13 8:22 ` Arnd Bergmann
2021-04-14 0:30 ` Andrew Jeffery
2021-03-19 6:27 ` [PATCH v2 17/21] dt-bindings: ipmi: Convert ASPEED KCS binding to schema Andrew Jeffery
2021-03-26 1:48 ` Rob Herring
2021-04-09 5:15 ` Zev Weiss
2021-04-09 5:33 ` Andrew Jeffery
2021-04-09 5:44 ` Zev Weiss
2021-04-09 8:46 ` Zev Weiss
2021-03-19 6:27 ` [PATCH v2 18/21] dt-bindings: ipmi: Add optional SerIRQ property to ASPEED KCS devices Andrew Jeffery
2021-03-26 1:49 ` Rob Herring
2021-03-19 6:27 ` [PATCH v2 19/21] ipmi: kcs_bmc_aspeed: Implement KCS SerIRQ configuration Andrew Jeffery
2021-04-01 9:30 ` [EXTERNAL] " Zev Weiss
2021-03-19 6:27 ` [PATCH v2 20/21] ipmi: kcs_bmc_aspeed: Fix IBFIE typo from datasheet Andrew Jeffery
2021-04-09 5:40 ` Zev Weiss
2021-03-19 6:27 ` [PATCH v2 21/21] ipmi: kcs_bmc_aspeed: Optionally apply status address Andrew Jeffery
2021-04-01 18:18 ` Re " Zev Weiss
2021-04-06 6:09 ` ChiaWei Wang [this message]
2021-04-09 3:18 ` [PATCH v2 01/21] dt-bindings: aspeed-lpc: Remove LPC partitioning Joel Stanley
2021-04-09 5:24 ` Andrew Jeffery
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=HK0PR06MB3779BE4C5C6E2758DC60FDCA91769@HK0PR06MB3779.apcprd06.prod.outlook.com \
--to=chiawei_wang@aspeedtech.com \
--cc=andrew@aj.id.au \
--cc=avifishman70@gmail.com \
--cc=benjaminfair@google.com \
--cc=devicetree@vger.kernel.org \
--cc=joel@jms.id.au \
--cc=lee.jones@linaro.org \
--cc=linus.walleij@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-aspeed@lists.ozlabs.org \
--cc=linux-gpio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=minyard@acm.org \
--cc=openbmc@lists.ozlabs.org \
--cc=openipmi-developer@lists.sourceforge.net \
--cc=robh+dt@kernel.org \
--cc=ryan_chen@aspeedtech.com \
--cc=tali.perry1@gmail.com \
--cc=tmaimon77@gmail.com \
--cc=venture@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).