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bh=VUIYcWBlMJzBBXmKOzZ8NlO0ajCvBQRUusSgDnbOcMM=; b=BaLG4/L0mkfOeOIy3/jYhLpmT0xYbOJDy0X/Zf0U9tIfO8Z1PUdm2ZbivqyVTVeHV2z7j13vvQ+/RI+cfzgiGuQoRk1nfc0F4poHujQa4tQhv4zFbNwNOrcbKy/4SPMaMNE7B6ZZZb22xDBbNmgMzGn1PjBRa+wlIWYp1LNhu/Hx29EbzdiEeLQ4IiZfExGJJ5s5ANRPy5mL1eHdyYiugweADY4ln/mnQ/gvYlwKbQMO0zxKjrntdPdInxxqsnEUxXqRVzN6eUQPAxWnXvuGCcOQigGrteccmzxtmdJs3Hdrv4JH19NRV2LaAMNw/HuyMh/IFmFUttPn0LdP4g+2Sg== From: Jamin Lin To: Paolo Bonzini , Peter Maydell , =?iso-8859-1?Q?C=E9dric_Le_Goater?= , Steven Lee , Troy Lee , Andrew Jeffery , Joel Stanley , =?iso-8859-1?Q?Marc-Andr=E9_Lureau?= , =?iso-8859-1?Q?Daniel_P=2E_Berrang=E9?= , =?iso-8859-1?Q?Philippe_Mathieu-Daud=E9?= , "open list:All patches CC here" , "open list:ARM TCG CPUs" CC: Jamin Lin , Troy Lee , Kane Chen , Joe Komlodi , Titus Rwantare , Patrick Venture Subject: [PATCH v3 14/20] hw/i3c/dw-i3c: Add ctrl MMIO handling Thread-Topic: [PATCH v3 14/20] hw/i3c/dw-i3c: Add ctrl MMIO handling Thread-Index: AQHclxdyNODx7i7L1UuqHM0bNFGiag== Date: Fri, 6 Feb 2026 03:19:47 +0000 Message-ID: <20260206031926.3227848-15-jamin_lin@aspeedtech.com> References: <20260206031926.3227848-1-jamin_lin@aspeedtech.com> In-Reply-To: <20260206031926.3227848-1-jamin_lin@aspeedtech.com> Accept-Language: zh-TW, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=aspeedtech.com; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a01:111:f403:c40f::6; envelope-from=jamin_lin@aspeedtech.com; helo=SEYPR02CU001.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @aspeedtech.com) X-ZM-MESSAGEID: 1770348155806154100 Content-Type: text/plain; charset="utf-8" Adds functionality to the CTRL register. Signed-off-by: Joe Komlodi Signed-off-by: Jamin Lin Reviewed-by: Titus Rwantare Reviewed-by: Patrick Venture Reviewed-by: Jamin Lin --- hw/i3c/dw-i3c.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/hw/i3c/dw-i3c.c b/hw/i3c/dw-i3c.c index 9a0460cf31..7a1f79e10d 100644 --- a/hw/i3c/dw-i3c.c +++ b/hw/i3c/dw-i3c.c @@ -344,6 +344,8 @@ static const uint32_t dw_i3c_ro[DW_I3C_NR_REGS] =3D { [R_SLAVE_CONFIG] =3D 0xffffffff, }; =20 +static void dw_i3c_cmd_queue_execute(DWI3C *s); + static inline bool dw_i3c_has_hdr_ts(DWI3C *s) { return ARRAY_FIELD_EX32(s->regs, HW_CAPABILITY, HDR_TS); @@ -503,6 +505,36 @@ static int dw_i3c_recv_data(DWI3C *s, bool is_i2c, uin= t8_t *data, return ret; } =20 +static void dw_i3c_ctrl_w(DWI3C *s, uint32_t val) +{ + /* + * If the user is setting I3C_RESUME, the controller was halted. + * Try and resume execution and leave the bit cleared. + */ + if (FIELD_EX32(val, DEVICE_CTRL, I3C_RESUME)) { + dw_i3c_cmd_queue_execute(s); + val =3D FIELD_DP32(val, DEVICE_CTRL, I3C_RESUME, 0); + } + /* + * I3C_ABORT being set sends an I3C STOP. It's cleared when the STOP is + * sent. + */ + if (FIELD_EX32(val, DEVICE_CTRL, I3C_ABORT)) { + dw_i3c_end_transfer(s, /*is_i2c=3D*/true); + dw_i3c_end_transfer(s, /*is_i2c=3D*/false); + val =3D FIELD_DP32(val, DEVICE_CTRL, I3C_ABORT, 0); + ARRAY_FIELD_DP32(s->regs, INTR_STATUS, TRANSFER_ABORT, 1); + dw_i3c_update_irq(s); + } + /* Update present state. */ + ARRAY_FIELD_DP32(s->regs, PRESENT_STATE, CM_TFR_ST_STATUS, + DW_I3C_TRANSFER_STATE_IDLE); + ARRAY_FIELD_DP32(s->regs, PRESENT_STATE, CM_TFR_STATUS, + DW_I3C_TRANSFER_STATUS_IDLE); + + s->regs[R_DEVICE_CTRL] =3D val; +} + static inline bool dw_i3c_target_is_i2c(DWI3C *s, uint16_t offset) { /* / sizeof(uint32_t) because we're indexing into our 32-bit reg array= . */ @@ -1575,6 +1607,9 @@ static void dw_i3c_write(void *opaque, hwaddr offset,= uint64_t value, "] =3D 0x%08" PRIx64 "\n", __func__, offset, value); break; + case R_DEVICE_CTRL: + dw_i3c_ctrl_w(s, val32); + break; case R_RX_TX_DATA_PORT: dw_i3c_push_tx(s, val32); break; --=20 2.43.0